U.S. patent application number 11/629072 was filed with the patent office on 2008-02-28 for steel frame beam-reinforcing metal fixture.
This patent application is currently assigned to Hitachi Metals Techno, Ltd.. Invention is credited to Takashi Kitano, Hideshige Matsuo, Kenzo Nakano, Syuji Ohba.
Application Number | 20080047221 11/629072 |
Document ID | / |
Family ID | 35907262 |
Filed Date | 2008-02-28 |
United States Patent
Application |
20080047221 |
Kind Code |
A1 |
Matsuo; Hideshige ; et
al. |
February 28, 2008 |
Steel Frame Beam-Reinforcing Metal Fixture
Abstract
The present invention provides a steel frame beam-reinforcing
metal fixture that is capable of recovering the full strength of a
steel frame beam to a greater extent than a conventional steel
frame beam-reinforcing metal fixture for an S structure. A steel
frame beam-reinforcing metal fixture is substantially fitted to a
web opening in an SRC beam. An outer peripheral portion of the
steel frame beam-reinforcing metal fixture is fillet-welded to a
steel frame beam web. The axial length of the steel frame
beam-reinforcing metal fixture is between 0.5 and 200.0 times the
thickness thereof in the radial direction. Furthermore, in the
steel frame beam-reinforcing metal fixture, a length from one end
side of the steel frame beam web to one end of the outer peripheral
portion and a length from the other end side of the steel frame
beam web to the other end of the outer peripheral portion are each
at least 0.7 times the thickness of the steel frame beam web.
Inventors: |
Matsuo; Hideshige; (Tokyo,
JP) ; Kitano; Takashi; (Tokyo, JP) ; Nakano;
Kenzo; (Tokyo, JP) ; Ohba; Syuji; (Tokyo,
JP) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
Hitachi Metals Techno, Ltd.
4-2, Toyo 2-chome, Koto-ku
Tokyo
JP
135-8363
|
Family ID: |
35907262 |
Appl. No.: |
11/629072 |
Filed: |
August 17, 2004 |
PCT Filed: |
August 17, 2004 |
PCT NO: |
PCT/JP04/11776 |
371 Date: |
January 25, 2007 |
Current U.S.
Class: |
52/653.1 |
Current CPC
Class: |
E04C 3/293 20130101;
E04C 3/08 20130101; E04C 2003/0452 20130101; E04C 3/065
20130101 |
Class at
Publication: |
052/653.1 |
International
Class: |
E04C 3/04 20060101
E04C003/04 |
Claims
1. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is fillet-welded
to said steel frame beam web, an axial length is between 0.5 and
200.0 times a thickness in a radial direction, and a length from
one end side of said steel frame beam web to one end of said outer
peripheral portion and a length from another end side of said steel
frame beam web to another end of said outer peripheral portion are
each at least 0.7 times a thickness of said steel frame beam
web.
2. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is butt-welded to
said steel frame beam web, an axial length is between 0.5 and 200.0
times a thickness in a radial direction, a length from one end side
of said steel frame beam web to another end of said outer
peripheral portion is greater than a thickness of said steel frame
beam web, and a joint surface of said outer peripheral portion,
which is joined to said steel frame beam web, includes a curved
surface (0.ltoreq.radius of curvature.ltoreq.five times said
thickness of said steel frame beam web).
3. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is butt-welded to
said steel frame beam web, an axial length is between0.5 and200.0
times a thickness in a radial direction, a length from one end side
of said steel frame beam web to another end of said outer
peripheral portion is greater than a thickness of said steel frame
beam web, and a joint surface of said outer peripheral portion,
which is joined to said steel frame beam web, includes a first
joint surface (0.ltoreq.length.ltoreq.said thickness of said steel
frame beam web) which is substantially parallel to said radial
direction, and a second joint surface which is inclined at an angle
.theta. (15.ltoreq..theta..ltoreq.80) from said axial
direction.
4. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction, an indirect member
fillet-welded to said steel frame beam web is fillet-welded to an
outer peripheral portion, and a length from one end side of said
steel frame beam web to one end of said indirect member and a
length from another end side of said steel frame beam web to
another end of said indirect member are each at least 0.7 times a
thickness of said steel frame beam web.
5. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction, an indirect member
butt-welded to said steel frame beam web is fillet-welded to an
outer peripheral portion, a length from one end side of said steel
frame beam web to another end of said indirect member is greater
than a thickness of said steel frame beam web, and a joint surface
of said indirect member, which is joined to said steel frame beam
web, includes a curved surface (0.ltoreq.radius of
curvature.ltoreq.five times said thickness of said steel frame beam
web).
6. A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction, an indirect member
butt-welded to said steel frame beam web is fillet-welded to an
outer peripheral portion, a length from one end side of said steel
frame beam web to another end of said indirect member is greater
than a thickness of said steel frame beam web, and a joint surface
of said indirect member, which is joined to said steel frame beam
web, includes a first joint surface (0.ltoreq.length.ltoreq.said
thickness of said steel frame beam web) which is substantially
parallel to said radial direction, and a second joint surface which
is inclined at an angle .theta. (15.ltoreq..theta..ltoreq.80) from
said axial direction.
7. A pair of steel frame beam-reinforcing metal fixtures comprising
a first steel frame beam-reinforcing metal fixture and a second
steel frame beam-reinforcing metal fixture, which is substantially
fitted to a web opening in a steel frame beam, characterized in
that an axial length of said first steel frame beam-reinforcing
metal fixture and said second steel frame beam-reinforcing metal
fixture is between 0.5 and 200.0 times a thickness in a radial
direction, an indirect member fillet-welded to said steel frame
beam web is fillet-welded to one end of said first steel frame
beam-reinforcing metal fixture and another end of said second steel
frame beam-reinforcing metal fixture, and a length from one end
side of said steel frame beam web to one end of said indirect
member and a length from another end side of said steel frame beam
web to another end of said indirect member are each at least 0.7
times a thickness of said steel frame beam web.
8. A pair of steel frame beam-reinforcing metal fixtures comprising
a first steel frame beam-reinforcing metal fixture and a second
steel frame beam-reinforcing metal fixture, which is substantially
fitted to a web opening in a steel frame beam, characterized in
that an axial length of said first steel frame beam-reinforcing
metal fixture and said second steel frame beam-reinforcing metal
fixture is between 0.5 and 200.0 times a thickness in a radial
direction, an indirect member butt-welded to said steel frame beam
web is fillet-welded to one end of said first steel frame
beam-reinforcing metal fixture and another end of said second steel
frame beam-reinforcing metal fixture, a length from one end side of
said steel frame beam web to another end of said indirect member is
greater than a thickness of said steel frame beam web, and a joint
surface of said indirect member, which is joined to said steel
frame beam web, includes a curved surface (0.ltoreq.radius of
curvature.ltoreq.five times said thickness of said steel frame beam
web).
9. A pair of steel frame beam-reinforcing metal fixtures comprising
a first steel frame beam-reinforcing metal fixture and a second
steel frame beam-reinforcing metal fixture, which is substantially
fitted to a web opening in a steel frame beam, characterized in
that an axial length of said first steel frame beam-reinforcing
metal fixture and said second steel frame beam-reinforcing metal
fixture is between 0.5 and 200.0 times a thickness in a radial
direction, an indirect member butt-welded to said steel frame beam
web is fillet-welded to one end of said first steel frame
beam-reinforcing metal fixture and another end of said second steel
frame beam-reinforcing metal fixture, a length from one end side of
said steel frame beam web to another end of said indirect member is
greater than a thickness of said steel frame beam web, and a joint
surface of said indirect member, which is joined to said steel
frame beam web, includes a first joint surface
(0.ltoreq.length.ltoreq.said thickness of said steel frame beam
web) which is substantially parallel to said radial direction, and
a second joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from said axial direction.
Description
TECHNICAL FIELD
[0001] The present invention relates to a steel frame
beam-reinforcing metal fixture which is substantially fitted to a
web opening provided in a steel frame beam web of a steel frame
beam in an S structure (steel structure) or an SRC structure (steel
framed reinforced concrete structure) to reinforce the steel frame
beam in the S structure and SRC structure.
BACKGROUND ART
[0002] A web opening is provided in a steel frame beam web of a
steel frame beam in an S structure or an SRC structure in a
building so that a pipe, a wire, or the like can be passed through
the interior of the web opening, and conventionally, an S structure
steel frame beam-reinforcing metal fixture such as the following is
provided to reinforce an S structure steel frame beam provided with
a web opening. The S structure steel frame beam-reinforcing metal
fixture takes a ring shape, and an outer peripheral portion thereof
is welded to a peripheral edge portion of the web opening formed in
the S structure steel frame beam. The axial length of the
reinforcing metal fixture is between 0.5 and 10.0 times its
thickness in the radial direction. According to this reinforcing
metal fixture, a pipe can be inserted into the web opening provided
in the steel frame beam of the S structure with an improved degree
of freedom, and a web opening can be formed in a plasticized region
of the steel frame beam in the vicinity of a column-beam joint
portion (see Japanese Unexamined Patent Application Publication
2003-232105).
DISCLOSURE OF THE INVENTION
[0003] This conventional S structure steel frame beam-reinforcing
metal fixture is welded by fillet welding or butt welding. However,
in the former case, the two axial end portions of the outer
peripheral portion of the S structure steel frame beam-reinforcing
metal fixture are merely welded to the peripheral edge portion of
the web opening from the front side and rear side around the entire
periphery thereof (paragraphs [0028], [0029], FIG. 1, and so on of
Japanese Unexamined Patent Application Publication 2003-232105),
while in the latter case, the axial length of a flange portion of
the S structure steel frame beam-reinforcing metal fixture, which
is welded by butt welding, is merely set at no more than half the
axial length of the S structure steel frame beam-reinforcing metal
fixture (paragraphs [0033], [0038], [0050], FIGS. 5, 6, and so on
of Japanese Unexamined Patent Application Publication 2003-232105).
Hence, in a conventional S structure steel frame beam-reinforcing
metal fixture, there is room for improvement in the extent to which
the full strength of the steel frame beam in the S structure can be
recovered.
[0004] Moreover, an improvement in full strength recovery is
required not only in a steel frame beam of an S structure, but also
in a steel frame beam of an SRC structure.
[0005] It is therefore an object of the present invention to
provide a steel frame beam-reinforcing metal fixture that is
capable of recovering the full strength of a steel frame beam in an
S structure or an SRC structure to a greater extent than a
conventional S structure steel frame beam-reinforcing metal
fixture.
[0006] According to the present invention, the object described
above can be achieved by the following means.
[0007] A first invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an outer peripheral portion is
fillet-welded to the steel frame beam web, an axial length is
between 0.5 and 200.0 times a thickness in a radial direction, and
a length from one end side of the steel frame beam web to one end
of the outer peripheral portion and a length from another end side
of the steel frame beam web to another end of the outer peripheral
portion are each at least 0.7 times a thickness of the steel frame
beam web.
[0008] A second invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an outer peripheral portion is
butt-welded to the steel frame beam web, an axial length is between
0.5 and 200.0 times a thickness in a radial direction, a length
from one end side of the steel frame beam web to another end of the
outer peripheral portion is greater than a thickness of the steel
frame beam web, and a joint surface of the outer peripheral
portion, which is joined to the steel frame beam web, includes a
curved surface (0.ltoreq.radius of curvature.ltoreq.five times the
thickness of the steel frame beam web).
[0009] A third invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an outer peripheral portion is
butt-welded to the steel frame beam web, an axial length is between
0.5 and 200.0 times a thickness in a radial direction, a length
from one end side of the steel frame beam web to another end of the
outer peripheral portion is greater than a thickness of the steel
frame beam web, and a joint surface of the outer peripheral
portion, which is joined to the steel frame beam web, includes a
first joint surface (0.ltoreq.length<the thickness of the steel
frame beam web) which is substantially parallel to the radial
direction, and a second joint surface which is inclined at an angle
.theta. (15.ltoreq.0.ltoreq.80) from the axial direction.
[0010] A fourth invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an axial length is between 0.5
and 200.0 times a thickness in a radial direction, an indirect
member fillet-welded to the steel frame beam web is fillet-welded
to an outer peripheral portion, and a length from one end side of
the steel frame beam web to one end of the indirect member and a
length from another end side of the steel frame beam web to another
end of the indirect member are each at least 0.7 times a thickness
of the steel frame beam web.
[0011] A fifth invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an axial length is between 0.5
and 200.0 times a thickness in a radial direction, an indirect
member butt-welded to the steel frame beam web is fillet-welded to
an outer peripheral portion, a length from one end side of the
steel frame beam web to another end of the indirect member is
greater than a thickness of the steel frame beam web, and a joint
surface of the indirect member, which is joined to the steel frame
beam web, includes a curved surface (0.ltoreq.radius of
curvature.ltoreq.five times the thickness of the steel frame beam
web).
[0012] A sixth invention is a steel frame beam-reinforcing metal
fixture which is substantially fitted to a web opening in a steel
frame beam, characterized in that an axial length is between 0.5
and 200.0 times a thickness in a radial direction, an indirect
member butt-welded to the steel frame beam web is fillet-welded to
an outer peripheral portion, a length from one end side of the
steel frame beam web to another end of the indirect member is
greater than a thickness of the steel frame beam web, and a joint
surface of the indirect member, which is joined to the steel frame
beam web, includes a first joint surface (0.ltoreq.length<the
thickness of the steel frame beam web) which is substantially
parallel to the radial direction, and a second joint surface which
is inclined at an angle .theta. (15.ltoreq..theta..ltoreq.80) from
the axial direction.
[0013] A seventh invention is a pair of steel frame
beam-reinforcing metal fixtures comprising a first steel frame
beam-reinforcing metal fixture and a second steel frame
beam-reinforcing metal fixture, which is substantially fitted to a
web opening in a steel frame beam, characterized in that an axial
length of the first steel frame beam-reinforcing metal fixture and
the second steel frame beam-reinforcing metal fixture is between
0.5 and 200.0 times a thickness in a radial direction, an indirect
member fillet-welded to the steel frame beam web is fillet-welded
to one end of the first steel frame beam-reinforcing metal fixture
and another end of the second steel frame beam-reinforcing metal
fixture, and a length from one end side of the steel frame beam web
to one end of the indirect member and a length from another end
side of the steel frame beam web to another end of the indirect
member are each at least 0.7 times a thickness of the steel frame
beam web.
[0014] An eighth invention is a pair of steel frame
beam-reinforcing metal fixtures comprising a first steel frame
beam-reinforcing metal fixture and a second steel frame
beam-reinforcing metal fixture, which is substantially fitted to a
web opening in a steel frame beam, characterized in that an axial
length of the first steel frame beam-reinforcing metal fixture and
the second steel frame beam-reinforcing metal fixture is between
0.5 and 200.0 times a thickness in a radial direction, an indirect
member butt-welded to the steel frame beam web is fillet-welded to
one end of the first steel frame beam-reinforcing metal fixture and
another end of the second steel frame beam-reinforcing metal
fixture, a length from one end side of the steel frame beam web to
another end of the indirect member is greater than a thickness of
the steel frame beam web, and a joint surface of the indirect
member, which is joined to the steel frame beam web, includes a
curved surface (0.ltoreq.radius of curvature.ltoreq.five times the
thickness of the steel frame beam web).
[0015] A ninth invention is a pair of steel frame beam-reinforcing
metal fixtures comprising a first steel frame beam-reinforcing
metal fixture and a second steel frame beam-reinforcing metal
fixture, which is substantially fitted to a web opening in a steel
frame beam, characterized in that an axial length of the first
steel frame beam-reinforcing metal fixture and the second steel
frame beam-reinforcing metal fixture is between 0.5 and 200.0 times
a thickness in a radial direction, an indirect member butt-welded
to the steel frame beam web is fillet-welded to one end of the
first steel frame beam-reinforcing metal fixture and another end of
the second steel frame beam-reinforcing metal fixture, a length
from one end side of the steel frame beam web to another end of the
indirect member is greater than a thickness of the steel frame beam
web, and a joint surface of the indirect member, which is joined to
the steel frame beam web, includes a first joint surface
(0.ltoreq.length<the thickness of the steel frame beam web)
which is substantially parallel to the radial direction, and a
second joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0016] According to the present invention, the strength of a welded
portion formed by welding a steel frame beam-reinforcing metal
fixture to a steel frame beam web can be set to be equal to or
greater than the strength of a steel frame beam. Hence, according
to the present invention, the full strength of the steel frame beam
can be recovered. Moreover, according to the present invention, the
full strength of a steel frame beam in an SRC structure, as well as
a steel frame beam in an S structure, can be recovered.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a view showing a first example of a part indicated
by a broken line in FIG. 13;
[0018] FIG. 2 is a view showing a second example of a part
indicated by a broken line in FIG. 13;
[0019] FIG. 3 is a view showing a third example of a part indicated
by a broken line in FIG. 13;
[0020] FIG. 4 is a view showing a fourth example of a part
indicated by a broken line in FIG. 13;
[0021] FIG. 5 is a view showing a fifth example of a part indicated
by a broken line in FIG. 13;
[0022] FIG. 6 is a view showing a sixth example of apart indicated
by a broken line in FIG. 13;
[0023] FIG. 7 is a view showing a seventh example of a part
indicated by a broken line in FIG. 13;
[0024] FIG. 8 is a view showing an eighth example of a part
indicated by a broken line in FIG. 13;
[0025] FIG. 9 is a view showing a ninth example of a part indicated
by a broken line in FIG. 13;
[0026] FIG. 10 is a view showing a tenth example of a part
indicated by a broken line in FIG. 13;
[0027] FIG. 11 is a view showing an eleventh example of a part
indicated by a broken line in FIG. 13;
[0028] FIG. 12 is a view showing a twelfth example of a part
indicated by a broken line in FIG. 13; and
[0029] FIG. 13 is a view showing an SRC beam reinforced by a steel
frame beam-reinforcing metal fixture according to an embodiment of
the present invention.
DESCRIPTION OF REFERENCE SYMBOLS
[0030] 1 SRC beam [0031] 2 main reinforcement [0032] 3 stirrup
[0033] 4 concrete [0034] 5 steel frame beam [0035] 5-1 steel frame
beam web [0036] 5-2 steel frame beam flange [0037] 6 web opening
[0038] 7-1 steel frame beam-reinforcing metal fixture [0039] 7-2
steel frame beam-reinforcing metal fixture [0040] 7-3 steel frame
beam-reinforcing metal fixture [0041] 7-4 steel frame
beam-reinforcing metal fixture [0042] 7-5 steel frame
beam-reinforcing metal fixture [0043] 7-6 steel frame
beam-reinforcing metal fixture [0044] 7-7 steel frame
beam-reinforcing metal fixture [0045] 7-8 steel frame
beam-reinforcing metal fixture [0046] 7-9-1 first steel frame
beam-reinforcing metal fixture [0047] 7-9-2 second steel frame
beam-reinforcing metal fixture [0048] 7-10-1 first steel frame
beam-reinforcing metal fixture [0049] 7-10-2 second steel frame
beam-reinforcing metal fixture [0050] 7-11-1 first steel frame
beam-reinforcing metal fixture [0051] 7-11-2 second steel frame
beam-reinforcing metal fixture [0052] 7-12-1 first steel frame
beam-reinforcing metal fixture [0053] 7-12-2 second steel frame
beam-reinforcing metal fixture [0054] 8 part indicated by broken
line in FIG. 13 [0055] 9 fillet welding [0056] 10 butt welding
[0057] 12 groove bottom portion [0058] 11-1 indirect member [0059]
11-2 indirect member [0060] 11-3 indirect member [0061] 11-4
indirect member [0062] ta axial length of steel frame
beam-reinforcing metal fixture [0063] tb thickness of steel frame
beam-reinforcing metal fixture in radial direction [0064] tw
thickness of steel frame beam web [0065] t1 length from one end
side of steel frame beam web to one end of outer peripheral
portion, length from other end side of steel frame beam web to
other end of outer peripheral portion, length from one end side of
steel frame beam web to one end of indirect member, length from
other end side of steel frame beam web to other end of indirect
member [0066] t2 length from one end side of steel frame beam web
to other end of outer peripheral portion, length from one end side
of steel frame beam web to other end of indirect member [0067] R
radius of curvature of first joint surface on steel frame
beam-reinforcing metal fixture, radius of curvature of first joint
surface on indirect member [0068] .theta. incline of second joint
surface on steel frame beam-reinforcing metal fixture from axial
direction, incline of second joint surface on indirect member from
axial direction [0069] L length of first joint surface on outer
peripheral portion, length of first joint surface on indirect
member
BEST MODE FOR CARRYING OUT THE INVENTION
[0070] A best mode for carrying out the present invention will be
described in detail below with reference to the attached
drawings.
[0071] FIG. 13 is a view showing an SRC beam 1 reinforced by a
steel frame beam-reinforcing metal fixture according to an
embodiment of the present invention.
[0072] As shown in FIG. 13, the SRC beam 1 comprises a main
reinforcement 2, a stirrup 3, concrete 4, and a steel frame beam 5
made of steel. The steel frame beam 5 comprises a steel frame beam
web 5-1 and a steel frame beam flange 5-2. A web opening 6 is
provided in the SRC beam 1, and a steel frame beam-reinforcing
metal fixture 7-1 according to an embodiment of the present
invention is substantially fitted to the web opening 6. The steel
frame beam-reinforcing metal fixture 7-1 is welded to the steel
frame beam web 5-1. Note that the steel frame beam-reinforcing
metal fixture 7-1 may be created from a member (made of cast steel,
forged steel, or similar, for example) having a material strength
that is equal to or greater than the material strength of the steel
frame beam web 5-1.
[0073] FIG. 1 is an enlarged view of a part 8 indicated by a broken
line in FIG. 13, and shows a first example of the part 8 indicated
by the broken line in FIG. 13.
[0074] As shown in FIG. 1, in the first example an outer peripheral
portion of the steel frame beam-reinforcing metal fixture 7-1 is
fillet-welded 9 to the steel frame beam web 5-1.
[0075] Note that in this specification, the axial direction of the
steel frame beam-reinforcing metal fixture 7-1 will be referred to
simply as the "axial direction", and the radial direction of the
steel frame beam-reinforcing metal fixture 7-1 will be referred to
simply as the "radial direction". Further, an axial thickness tw of
the steel frame beam web 5-1 denotes the length of the steel frame
beam web 5-1 in the axial direction of the steel frame
beam-reinforcing metal fixture 7-1.
[0076] Here, an axial length ta of the steel frame beam-reinforcing
metal fixture 7-1 is between 0.5 and 200.0 times a thickness tb
thereof in the radial direction. Furthermore, in the steel frame
beam-reinforcing metal fixture 7-1, a length t1 from one end side
of the steel frame beam web 5-1 to one end of the outer peripheral
portion and a length t1 from the other end side of the steel frame
beam web 5-1 to the other end of the outer peripheral portion are
each at least 0.7 times the thickness tw of the steel frame beam
web 5-1. Note that in the first example shown in FIG. 1, the length
from one end side of the steel frame beam web 5-1 to one end of the
outer peripheral portion and the length from the other end side of
the steel frame beam web 5-1 to the other end of the outer
peripheral portion are identical (both are set at t1), but this is
simply for ease of description, and accordingly, the present
invention is not limited to an aspect in which the length from one
end side of the steel frame beam web 5-1 to one end of the outer
peripheral portion and the length from the other end side of the
steel frame beam web 5-1 to the other end of the outer peripheral
portion are identical.
[0077] According to the steel frame beam-reinforcing metal fixture
7-1, the strength of the welded portion 9 is greater than the
strength of the steel frame beam web 5-1, and therefore the full
strength of the steel frame beam can be recovered. This will now be
described using mathematical expressions.
[0078] The strength of the steel frame beam web is expressed by the
following equation. (strength of steel frame beam
web)=t.sub.w.times..pi..times.(length of web opening
diameter).times.(allowable stress) [Numeral 1]
[0079] The strength of the welded portion 9 is expressed by the
following equation. (maximum value of strength of welded portion
9)=2.times.t.sub.1/ 2.times..pi..times.(length of web opening
diameter).times.(allowable stress) [Numeral 2]
[0080] In the steel frame beam-reinforcing metal fixture 7-1
according to the first example, the length t1 from one end side of
the steel frame beam web 5-1 to one end of the outer peripheral
portion and the length t1 from the other end side of the steel
frame beam web 5-1 to the other end of the outer peripheral portion
are each at least 0.7 times the thickness tw of the steel frame
beam web 5-1, and hence the following equation can be derived.
2.times.t.sub.1/ 2.times..pi..times.(length of web opening
diameter).times.(allowable
stress).gtoreq.t.sub.w.times..pi..times.(length of web opening
diameter).times.(allowable stress) .thrfore. t.sub.1.gtoreq.1/
2.times.t.sub.w.apprxeq.0.7t.sub.w [Numeral 3]
[0081] Note that the constitution shown in FIG. 1 is an example of
the part 8 indicated by the broken line in FIG. 13, and in the
present invention, the part 8 indicated by the broken line in FIG.
13 may also be realized by the following constitutions shown in
FIGS. 2 to 12, for example. The constitutions shown in FIGS. 2 to
12 will be described below in sequence.
[0082] FIG. 2 is a view showing a second example of the part 8
indicated by the broken line in FIG. 13.
[0083] As shown in FIG. 2, a steel frame beam-reinforcing metal
fixture 7-2 according to the second example comprises an outer
peripheral portion having a projecting portion a tone end side, and
this projecting portion on one end side of the outer peripheral
portion is fillet-welded 9 to the steel frame beam web 5-1 together
with a plane on the other end side of the outer peripheral
portion.
[0084] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture is between 0.5 and 200.0 times the
thickness tb thereof in the radial direction at the other end side.
Furthermore, in the steel frame beam-reinforcing metal fixture 7-2,
the length t1 from one end side of the steel frame beam web 5-1 to
one end of the outer peripheral portion and the length t1 from the
other end side of the steel frame beam web 5-1 to the other end of
the outer peripheral portion are each at least 0.7 times the
thickness tw of the steel frame beam web 5-1. Note that in the
second example shown in FIG. 2, the length from one end side of the
steel frame beam web 5-1 to one end of the outer peripheral portion
and the length from the other end side of the steel frame beam web
5-1 to the other end of the outer peripheral portion are identical
(both are set at t1), but this is simply for ease of description,
and accordingly, the present invention is not limited to an aspect
in which the length from one end side of the steel frame beam web
5-1 to one end of the outer peripheral portion and the length from
the other end side of the steel frame beam web 5-1 to the other end
of the outer peripheral portion are identical.
[0085] Similarly to the first example, in the second example the
strength of the welded portion 9 is greater than the strength of
the steel frame beam web 5-1, and therefore the full strength of
the steel frame beam can be recovered.
[0086] FIG. 3 is a view showing a third example of the part 8
indicated by the broken line in FIG. 13.
[0087] As shown in FIG. 3, a steel frame beam-reinforcing metal
fixture 7-3 according to the third example comprises an outer
peripheral portion having a projecting portion at one end side. The
other end side of the outer peripheral portion is formed with a
first joint surface (curved surface) having a radius of curvature R
(0.ltoreq.R.ltoreq.five times the thickness tw of the steel frame
beam web 5-1), and a second joint surface (inclined plane) formed
as a continuation of the curved surface and inclined at an angle
.theta. (15.ltoreq..theta..ltoreq.80) from the axial direction. The
first joint surface and second joint surface are butt-welded 10 to
the steel frame beam web 5-1.
[0088] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-3 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction at the other end
side. Furthermore, in the steel frame beam-reinforcing metal
fixture 7-3, a length t2 from one end side of the steel frame beam
web to the other end of the outer peripheral portion is greater
than the thickness tw of the steel frame beam web 5-1.
[0089] According to the third example, the entire joint surface of
the steel frame beam web 5-1 is welded to the outer peripheral
portion of the steel frame beam-reinforcing metal fixture 7-3, and
therefore the full strength of the steel frame beam can be
recovered.
[0090] Also according to the third example, a curved surface is
provided on a groove bottom portion 12 of the steel frame
beam-reinforcing metal fixture 7-3, and therefore weld metal lo can
be welded to the groove bottom portion 12 easily. Hence, according
to the third example, high quality welding can be performed easily
at the groove bottom portion 12.
[0091] Also according to the third example, the second joint
surface (inclined plane) is formed as a continuation of the first
joint surface and inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, and
therefore slag or the like generated during welding can be
discharged to the exterior of the groove, enabling easy and high
quality welding.
[0092] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the third example, however, the radius of
curvature R of the first joint surface (curved surface) on the
steel frame beam-reinforcing metal fixture 7-3 is set at
0.ltoreq.R.ltoreq.(five times the thickness tw of the steel frame
beam web 5-1), and the angle of incline of the second joint surface
(inclined plane), which is a continuation of the first joint
surface (curved surface), is set at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, and
therefore the volume of the weld metal 10 does not increase
unnecessarily. Hence, according to the third example, the
likelihood of flaws in the weld metal 10 can be reduced. Note that
in the third example, the second joint surface (inclined plane) is
inclined at the angle .theta. (15.ltoreq..theta..ltoreq.80) from
the axial direction, but when the angle .theta. is within a range
of 30 to 70 degrees, the likelihood of flaws in the weld metal 10
can be reduced even further, and moreover, the required amount of
weld metal lo can be reduced, enabling a reduction in cost.
[0093] In the third example, the first joint surface on the outer
peripheral portion of the steel frame beam-reinforcing metal
fixture 7-3 is a curved surface and the joint surface of the steel
frame beam web 5-1 is a plane, but in the present invention, the
first joint surface and second joint surface on the outer
peripheral portion of the steel frame beam-reinforcing metal
fixture 7-3 maybe formed as an integral plane and the joint surface
of the steel frame beam web 5-1 may be formed as a curved surface.
In this case, the steel frame beam web 5-1 may be provided with an
inclined plane which is formed as a continuation of a curved
surface provided on the joint surface and inclined at the angle
.theta. (15.ltoreq..theta..ltoreq.80) from the axial direction.
[0094] Further, in the third example, the other end side of the
outer peripheral portion of the steel frame beam-reinforcing metal
fixture 7-3 is provided with the first joint surface (curved
surface) having the radius of curvature R and the second joint
surface (inclined plane) formed as a continuation of the curved
surface and inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, but in the
present invention, an inclined plane such as the second joint
surface may be omitted, and the other end side of the outer
peripheral portion of the steel frame beam-reinforcing metal
fixture 7-3 may be provided with a joint surface (curved surface)
having the radius of curvature R alone.
[0095] FIG. 4 is a view showing a fourth example of the part 8
indicated by the broken line in FIG. 13.
[0096] As shown in FIG. 4, a steel frame beam-reinforcing metal
fixture 7-4 according to the fourth example comprises an outer
peripheral portion having a projecting portion atone end side. The
other end side of the outer peripheral portion is formed with a
first joint surface that is substantially parallel to the radial
direction of the steel frame beam-reinforcing metal fixture 7-4,
and a second joint surface that is inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-4. The first joint surface
and second joint surface are butt-welded 10 to the steel frame beam
web 5-1.
[0097] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-4 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction at the other end
side. Furthermore, in the steel frame beam-reinforcing metal
fixture 7-4, the length t2 from one end side of the steel frame
beam web 5-1 to the other end of the outer peripheral portion is
greater than the thickness tw of the steel frame beam web 5-1. Also
in the steel frame beam-reinforcing metal fixture 7-4, a length L
of the first joint surface on the outer peripheral portion
satisfies a condition of 0.ltoreq.L.ltoreq.(thickness tw of the
steel frame beam web 5-1).
[0098] According to the fourth example, the entire joint surface of
the steel frame beam web 5-1 is welded to the outer peripheral
portion of the steel frame beam-reinforcing metal fixture 7-4, and
therefore the full strength of the steel frame beam can be
recovered.
[0099] According to the fourth example, the second joint surface of
the steel frame beam-reinforcing metal fixture 7-4 is inclined at
the angle .theta. (15.ltoreq..theta..ltoreq.80) from the axial
direction, and therefore slag or the like generated during welding
can be discharged to the exterior of the groove, enabling easy and
high quality welding.
[0100] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the fourth example, however, the angle of incline
of the second joint surface of the steel frame beam-reinforcing
metal fixture 7-4 is set at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, and
therefore the volume of the weld metal 10 does not increase
unnecessarily. Hence, according to the fourth example, the
likelihood of flaws in the weld metal 10 can be reduced. Note that
in the fourth example, the second joint surface of the steel frame
beam-reinforcing metal fixture 7-4 is inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, but when
the angle .theta. is within a range of 30 to 70 degrees, the
likelihood of flaws in the weld metal 10 can be reduced even
further, and moreover, the required amount of weld metal 10 can be
reduced, enabling a reduction in cost.
[0101] In the fourth example, the second joint surface on the outer
peripheral portion of the steel frame beam-reinforcing metal
fixture 7-4 is inclined from the axial direction, while the joint
surface of the steel frame beam web 5-1 is substantially parallel
to the axial direction. However, in the present invention, the
second joint surface on the outer peripheral portion of the steel
frame beam-reinforcing metal fixture 7-4 may be made substantially
parallel to the axial direction, and the joint surface of the steel
frame beam web 5-1 may be inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0102] FIG. 5 is a view showing a fifth example of the part
indicated by the broken line in FIG. 13.
[0103] As shown in FIG. 5, an indirect member 11-1 is fillet-welded
9 to the outer peripheral portion of a steel frame beam-reinforcing
metal fixture 7-5 according to the fifth example, and the indirect
member 11-1 is fillet-welded 9 to the steel frame beam web 5-1.
[0104] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-5 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction. Also in the steel
frame beam-reinforcing metal fixture 7-5, the length t1 from one
end side of the steel frame beam web 5-1 to one end of the indirect
member 11-1 and the length t1 from the other end side of the steel
frame beam web 5-1 to the other end of the indirect member 11-1 are
each at least 0.7 times the thickness tw of the steel frame beam
web 5-1. Note that in the fifth example shown in FIG. 5, the length
from one end side of the steel frame beam web 5-1 to one end of the
indirect member and the length from the other end side of the steel
frame beam web 5-1 to the other end of the indirect member are
identical (both are set at t1), but this is simply for ease of
description, and accordingly, the present invention is not limited
to an aspect in which the length from one end side of the steel
frame beam web 5-1 to one end of the indirect member and the length
from the other end side of the steel frame beam web 5-1 to the
other end of the indirect member are identical.
[0105] Similarly to the first example, in the fifth example the
strength of the welded portion 9 is greater than the strength of
the steel frame beam web 5-1, and therefore the full strength of
the steel frame beam can be recovered.
[0106] FIG. 6 is a view showing a sixth example of the part 8
indicated by the broken line in FIG. 13.
[0107] As shown in FIG. 6, an indirect member 11-2 comprising a
projecting portion at one end side is fillet-welded 9 to the outer
peripheral portion of a steel frame beam-reinforcing metal fixture
7-6 according to the sixth example. The projecting portion at one
end side of the indirect member 11-2 and a plane at the other end
side thereof are respectively fillet-welded 9 to the steel frame
beam web 5-1.
[0108] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-6 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction. Also in the steel
frame beam-reinforcing metal fixture 7-6, the length t1 from one
end side of the steel frame beam web 5-1 to one end of the indirect
member 11-2 and the length t1 from the other end side of the steel
frame beam web 5-1 to the other end of the indirect member 11-2 are
each at least 0.7 times the thickness tw of the steel frame beam
web 5-1. Note that in the sixth example shown in FIG. 6, the length
from one end side of the steel frame beam web 5-1 to one end of the
indirect member and the length from the other end side of the steel
frame beam web 5-1 to the other end of the indirect member are
identical (both are set at t1), but this is simply for ease of
description, and accordingly, the present invention is not limited
to an aspect in which the length from one end side of the steel
frame beam web 5-1 to one end of the indirect member and the length
from the other end side of the steel frame beam web 5-1 to the
other end of the indirect member are identical.
[0109] Similarly to the first example, in the sixth example the
strength of the welded portion 9 is greater than the strength of
the steel frame beam web 5-1, and therefore the full strength of
the steel frame beam can be recovered.
[0110] FIG. 7 is a view showing a seventh example of the part 8
indicated by the broken line in FIG. 13.
[0111] As shown in FIG. 7, an indirect member 11-3 comprising a
projecting portion at one end side and formed with a first joint
surface (curved surface) having a radius of curvature R
(0.ltoreq.R.ltoreq.five times the thickness tw of the steel frame
beam web 5-1) and a second joint surface (inclined plane) formed as
a continuation of the curved surface and inclined at an angle
.theta. (15.ltoreq..theta..ltoreq.80) from the axial direction at
the other end side is fillet-welded 9 to the outer peripheral
portion of a steel frame beam-reinforcing metal fixture 7-7
according to the seventh example. The first joint surface and
second joint surface on the other end side of the indirect member
11-3 are butt-welded 10 to the steel frame beam web 5-1.
[0112] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-7 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction. In the steel
frame beam-reinforcing metal fixture 7-7, the length t2 from one
end side of the steel frame beam web 5-1 to the other end of the
indirect member 11-3 is greater than the thickness tw of the steel
frame beam web 5-1.
[0113] According to the seventh example, the entire joint surface
of the steel frame beam web 5-1 is welded to the indirect member
11-3, and therefore the full strength of the steel frame beam can
be recovered.
[0114] Also according to the seventh example, a curved surface is
provided on the groove bottom portion 12 of the indirect member
11-3, and therefore the weld metal 10 can be welded to the groove
bottom portion 12 easily. Hence, according to the seventh example,
high quality welding can be performed easily at the groove bottom
portion 12.
[0115] Also according to the seventh example, the second joint
surface is inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-7, and therefore slag or the
like generated during welding can be discharged to the exterior of
the groove, enabling easy and high quality welding.
[0116] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the seventh example, however, the radius of
curvature of the first joint surface (curved surface) on the
indirect member 11-3 is set at 0.ltoreq.radius of curvature
R.ltoreq.(five times the thickness tw of the steel frame beam web
5-1), and the angle of incline of the second joint surface
(inclined plane) is set at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-7, and therefore the volume
of the weld metal 10 does not increase unnecessarily.
[0117] Hence, according to the seventh example, the likelihood of
flaws in the weld metal 10 can be reduced. Note that in the seventh
example, the second joint surface (inclined plane) is inclined at
the angle .theta. (15.ltoreq..theta..ltoreq.80) from the axial
direction of the steel frame beam-reinforcing metal fixture 7-7,
but when the angle .theta. is within a range of 30 to 70 degrees,
the likelihood of flaws in the weld metal 10 can be reduced even
further, and moreover, the required amount of weld metal 10 can be
reduced, enabling a reduction in cost.
[0118] In the seventh example, the first joint surface of the
indirect member 11-3 is a curved surface and the joint surface of
the steel frame beam web 5-1 is a plane, but in the present
invention, the first joint surface and second joint surface of the
indirect member 11-3 may be formed as an integral plane and the
joint surface of the steel frame beam web 5-1 may be formed as a
curved surface. In this case, the steel frame beam web 5-1 may be
provided with an inclined plane formed as a continuation of the
curved surface and inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-7.
[0119] Further, in the seventh example, the other end side of the
indirect member 11-3 is formed with the first joint surface (curved
surface) having the radius of curvature R and the second joint
surface (inclined plane) formed as a continuation of the curved
surface and inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, but in the
present invention, an inclined plane may be omitted, and the other
end side of the indirect member 11-3 may be provided with a curved
surface having the radius of curvature R alone.
[0120] FIG. 8 is a view showing an eighth example of the part 8
indicated by the broken line in FIG. 13.
[0121] As shown in FIG. 8, an indirect member 11-4 comprising a
projecting portion at one end side and formed with a first joint
surface which is substantially parallel to the radial direction of
a steel frame beam-reinforcing metal fixture 7-8 according to the
eighth example and a second joint surface which is inclined at an
angle .theta. (15.ltoreq..theta..ltoreq.80) from the axial
direction of the steel frame beam-reinforcing metal fixture 7-8 is
fillet-welded 9 to the outer peripheral portion of the steel frame
beam-reinforcing metal fixture 7-8. The first joint surface and
second joint surface of the indirect member 11-4 are butt-welded 10
to the steel frame beam web 5-1.
[0122] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-8 is between 0.5 and 200.0 times
the thickness tb thereof in the radial direction. Furthermore, in
the steel frame beam-reinforcing metal fixture 7-8, the length t2
from one end side of the steel frame beam web 5-1 to the other end
of the indirect member 11-4 is greater than the thickness tw of the
steel frame beam web 5-1. Also in the steel frame beam-reinforcing
metal fixture 7-8, the length L of the first joint surface on the
indirect member 11-4 satisfies a condition of
0.ltoreq.L.ltoreq.(thickness tw of the steel frame beam web
5-1).
[0123] According to the eighth example, the entire joint surface of
the steel frame beam web 5-1 is welded to the indirect member 11-4,
and therefore the full strength of the steel frame beam can be
recovered.
[0124] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the eighth example, however, the angle of incline
of the second joint surface on the indirect member 11-4 is set at
the angle .theta. (15.ltoreq..theta..ltoreq.80) from the axial
direction, and therefore the volume of the weld metal 10 does not
increase unnecessarily. Hence, according to the eighth example, the
likelihood of flaws in the weld metal 10 can be reduced.
[0125] Note that in the eighth example, the second joint surface of
the steel frame beam-reinforcing metal fixture 7-8 is inclined at
the angle .theta. (15.ltoreq..theta..ltoreq.80) from the axial
direction, but when the angle .theta. is within a range of 30 to 70
degrees, the likelihood of flaws in the weld metal 10 can be
reduced even further, and moreover, the required amount of weld
metal 10 can be reduced, enabling a reduction in cost.
[0126] In the eighth example, the joint surface of the indirect
member 11-4 is inclined from the axial direction, while the joint
surface of the steel frame beam web 5-1 is substantially parallel
to the axial direction. However, in the present invention, the
joint surface of the indirect member 11-4 may be made substantially
parallel to the axial direction, and the joint surface of the steel
frame beam web 5-1 maybe inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0127] FIG. 9 is a view showing a ninth example of the part 8
indicated by the broken line in FIG. 13.
[0128] As shown in FIG. 9, in the ninth example, a first steel
frame beam-reinforcing metal fixture 7-9-1 and a second steel frame
beam-reinforcing metal fixture 7-9-2 are substantially fitted to
the web opening 6 in the SRC beam 1.
[0129] The indirect member 11-1 is fillet-welded 9 to one end of
the first steel frame beam-reinforcing metal fixture 7-9-1 and the
other end of the second steel frame beam-reinforcing metal fixture
7-9-2, and the indirect member 11-1 is fillet-welded 9 to the steel
frame beam web 5-1.
[0130] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-9-1, 7-9-2 is between 0.5 and
200.0 times the thickness tb thereof in the radial direction.
Further, in the steel frame beam-reinforcing metal fixture 7-9-1,
7-9-2, the length t1 from one end side of the steel frame beam web
5-1 to one end of the indirect member 11-1 and the length t1 from
the other end side of the steel frame beam web 5-1 to the other end
of the indirect member 11-1 are each at least 0.7 times the
thickness tw of the steel frame beam web 5-1. Note that in the
ninth example shown in FIG. 9, the length from one end side of the
steel frame beam web 5-1 to one end of the indirect member 11-1 and
the length from the other end side of the steel frame beam web 5-1
to the other end of the indirect member 11-1 are identical (both
are set at t1), but this is simply for ease of description, and
accordingly, the present invention is not limited to an aspect in
which the length from one end side of the steel frame beam web 5-1
to one end of the indirect member 11-1 and the length from the
other end side of the steel frame beam web 5-1 to the other end of
the indirect member 11-1 are identical.
[0131] Similarly to the first example, in the ninth example the
strength of the welded portion 9 is greater than the strength of
the steel frame beam web 5-1, and therefore the full strength of
the steel frame beam can be recovered.
[0132] FIG. 10 is a view showing a tenth example of the part 8
indicated by the broken line in FIG. 13.
[0133] As shown in FIG. 10, in the tenth example, a first steel
frame beam-reinforcing metal fixture 7-10-1 and a second steel
frame beam-reinforcing metal fixture 7-10-2 are substantially
fitted to the web opening 6 in the SRC beam 1.
[0134] The indirect member 11-2, which comprises a projecting
portion at one end side, is fillet-welded 9 to one end of the first
steel frame beam-reinforcing metal fixture 7-10-1 and the other end
of the second steel frame beam-reinforcing metal fixture 7-10-2.
The projecting portion at one end side of the indirect member 11-2
and a plane at the other end side thereof are respectively
fillet-welded 9 to the steel frame beam web 5-1.
[0135] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-10-1, 7-10-2 is between 0.5 and
200.0 times the thickness tb thereof in the radial direction. Also
in the steel frame beam-reinforcing metal fixture 7-10-1, 7-10-2,
the length t1 from one end side of the steel frame beam web 5-1 to
one end of the indirect member 11-2 and the length t1 from the
other end side of the steel frame beam web 5-1 to the other end of
the indirect member 11-2 are each at least 0.7 times the thickness
tw of the steel frame beam web 5-1. Note that in the tenth example
shown in FIG. 10, the length from one end side of the steel frame
beam web 5-1 to one end of the indirect member 11-2 and the length
from the other end side of the steel frame beam web 5-1 to the
other end of the indirect member 11-2 are identical (both are set
at t1), but this is simply for ease of description, and
accordingly, the present invention is not limited to an aspect in
which the length from one end side of the steel frame beam web 5-1
to one end of the indirect member 11-2 and the length from the
other end side of the steel frame beam web 5-1 to the other end of
the indirect member 11-2 are identical.
[0136] Similarly to the first example, in the tenth example the
strength of the welded portion 9 is greater than the strength of
the steel frame beam web 5-1, and therefore the full strength of
the steel frame beam can be recovered.
[0137] FIG. 11 is a view showing an eleventh example of the part 8
indicated by the broken line in FIG. 13.
[0138] As shown in FIG. 11, in the eleventh example, a first steel
frame beam-reinforcing metal fixture 7-11-1 and a second steel
frame beam-reinforcing metal fixture 7-11-2 are substantially
fitted to the web opening 6 in the SRC beam 1.
[0139] The indirect member 11-3, which comprises a projecting
portion at one end side and is formed with the first joint surface
(curved surface) having the radius of curvature R
(0.ltoreq.R.ltoreq.five times the thickness tw of the steel frame
beam web 5-1) and the second joint surface (inclined plane) formed
as a continuation of the curved surface and inclined at the angle
.theta. (15.ltoreq..theta..ltoreq.80) from the axial direction at
the other end side, is fillet-welded 9 to one end of the first
steel frame beam-reinforcing metal fixture 7-11-1 and the other end
of the second steel frame beam-reinforcing metal fixture 7-11-2.
The first joint surface and second joint surface on the other end
side of the indirect member 11-3 are butt-welded 10 to the steel
frame beam web 5-1.
[0140] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-11-1, 7-11-2 is between 0.5 and
200.0 times the thickness tb thereof in the radial direction.
Furthermore, in the steel frame beam-reinforcing metal fixture
7-11-1, 7-11-2, the length t2 from one end side of the steel frame
beam web 5-1 to the other end of the indirect member 11-3 is
greater than the thickness tw of the steel frame beam web 5-1.
[0141] According to the eleventh example, the entire joint surface
of the steel frame beam web 5-1 is welded to the indirect member
11-3, and therefore the full strength of the steel frame beam can
be recovered.
[0142] Also according to the eleventh example, a curved surface is
provided on the joint surface of the indirect member 11-3, and
therefore the weld metal 10 can be welded to the groove bottom
portion 12 easily. Hence, according to the eleventh example, high
quality welding can be performed easily at the groove bottom
portion 12.
[0143] Also according to the eleventh example, the second joint
surface is inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-11-1, 7-11-2, and therefore
slag or the like generated during welding can be discharged to the
exterior of the groove, enabling easy and high quality welding.
[0144] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the eleventh example, however, the radius of
curvature of the first joint surface (curved surface) on the
indirect member 11-3 is set at 0.ltoreq.radius of
curvature.ltoreq.(five times the thickness tw of the steel frame
beam web 5-1), and the angle of incline of the second joint surface
(inclined plane) is set at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-11-1, 7-11-2, and therefore
the volume of the weld metal 10 does not increase unnecessarily.
Hence, according to the eleventh example, the likelihood of flaws
in the weld metal 10 can be reduced. Note that in the eleventh
example, the second joint surface is inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-11-1, 7-11-2, but when the
angle .theta. is within a range of 30 to 70 degrees, the likelihood
of flaws in the weld metal 10 can be reduced even further, and
moreover, the required amount of weld metal 10 can be reduced,
enabling a reduction in cost.
[0145] In the eleventh example, the first joint surface on the
indirect member 11-3 is a curved surface and the joint surface of
the steel frame beam web 5-1 is a plane, but in the present
invention, the first joint surface and second joint surface on the
indirect member 11-3 may be formed as an integral plane and the
joint surface of the steel frame beam web 5-1 may be formed as a
curved surface. In this case, the steel frame beam web 5-1 may be
provided with an inclined plane inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-11-1, 7-11-2.
[0146] Further, in the eleventh example, the other end side of the
indirect member 11-3 is formed with the first joint surface (curved
surface) having the radius of curvature R and the second joint
surface (inclined plane) formed as a continuation of the curved
surface and inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction, but in the
present invention, an inclined plane may be omitted, and the other
end side of the indirect member 11-3 may be provided with a curved
surface having the radius of curvature R alone.
[0147] FIG. 12 is a view showing a twelfth example of the part 8
indicated by the broken line in FIG. 13.
[0148] As shown in FIG. 12, in the twelfth example, a first steel
frame beam-reinforcing metal fixture 7-12-1 and a second steel
frame beam-reinforcing metal fixture 7-12-2 are substantially
fitted to the web opening 6 in the SRC beam 1.
[0149] The indirect member 11-4, which comprises a projecting
portion at one end side and is formed with a first joint surface
that is substantially parallel to the radial direction of the steel
frame beam-reinforcing metal fixture 7-12-1, 7-12-2 and a second
joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction of the steel
frame beam-reinforcing metal fixture 7-12-1, 7-12-2, is
fillet-welded 9 to one end of the first steel frame
beam-reinforcing metal fixture 7-12-1 and the other end of the
second steel frame beam-reinforcing metal fixture 7-12-2. The first
joint surface and second joint surface of the indirect member 11-4
are butt-welded 10 to the steel frame beam web 5-1.
[0150] Here, the axial length ta of the steel frame
beam-reinforcing metal fixture 7-12-1, 7-12-2 is between 0.5 and
200.0 times the thickness tb thereof in the radial direction.
Furthermore, in the steel frame beam-reinforcing metal fixture
7-12-1, 7-12-2, the length t2 from one end side of the steel frame
beam web to the other end of the indirect member 11-4 is greater
than the thickness tw of the steel frame beam web 5-1. Also in the
steel frame beam-reinforcing metal fixture 7-12-1, 7-12-2, the
length L of the first joint surface on the indirect member 11-4
satisfies a condition of 0.ltoreq.L<(thickness tw of the steel
frame beam web 5-1).
[0151] According to the twelfth example, the entire joint surface
of the steel frame beam web 5-1 is welded to the indirect member
11-4, and therefore the full strength of the steel frame beam can
be recovered.
[0152] Typically, when the volume of the weld metal 10 increases,
multi-layer buildup welding must be performed, and as a result,
slag remains in the weld metal, causing welding defects and the
like which lead to an increase in the likelihood of flaws in the
weld metal 10. In the twelfth example, however, the angle of
incline of the second joint surface on the indirect member 11-4 is
set at the angle .theta. (15.ltoreq..theta..ltoreq.80) from the
axial direction, and therefore the volume of the weld metal 10 does
not increase unnecessarily. Hence, according to the twelfth
example, the likelihood of flaws in the weld metal 10 can be
reduced.
[0153] Note that in the twelfth example, the second joint surface
of the steel frame beam-reinforcing metal fixture 7-12-1, 7-12-2 is
inclined at the angle .theta. (15.ltoreq..theta..ltoreq.80) from
the axial direction, but when the angle .theta. is within a range
of 30 to 70 degrees, the likelihood of flaws in the welded portion
can be reduced even further, and moreover, the required amount of
weld metal 10 can be reduced, enabling a reduction in cost.
[0154] In the twelfth example, the joint surface of the indirect
member 11-4 is inclined from the axial direction, while the joint
surface of the steel frame beam web 5-1 is substantially parallel
to the axial direction. However, in the present invention, the
joint surface of the indirect member 11-4 may be made substantially
parallel to the axial direction, and the joint surface of the steel
frame beam web 5-1 may be inclined at the angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0155] Note that in the embodiment of the present invention
described above, the steel frame beam-reinforcing metal fixture is
substantially fitted to a web opening provided in a steel frame
beam web of a steel frame beam in an SRC structure, and by welding
the fitted steel frame beam-reinforcing metal fixture to the steel
frame beam web, the steel frame beam in the SRC is reinforced.
Needless to say, however, the steel frame beam that is reinforced
by the steel frame beam-reinforcing metal fixture according to the
present invention is not limited to a steel frame beam in an SRC
structure. Hence, in the present invention, the steel frame
beam-reinforcing metal fixture may be substantially fitted to a web
opening in an steel frame beam web of a steel frame beam in an S
structure, for example, and by welding the fitted steel frame
beam-reinforcing metal fixture to the peripheral edge portion of
the web opening provided in the steel frame beam web, the steel
frame beam in the S structure may be reinforced.
[0156] (Notes)
[0157] The present invention comprises the following notes.
[0158] (Note 1)
[0159] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is fillet-welded
to the steel frame beam web,
[0160] an axial length is between 0.5 and 200.0 times a thickness
in a radial direction, and
[0161] a length from one end side of the steel frame beam web to
one end of the outer peripheral portion and a length from another
end side of the steel frame beam web to another end of the outer
peripheral portion are each at least 0.7 times a thickness of the
steel frame beam web.
[0162] (Note 2)
[0163] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is butt-welded to
the steel frame beam web,
[0164] an axial length is between 0.5 and 200.0 times a thickness
in a radial direction,
[0165] a length from one end side of the steel frame beam web to
another end of the outer peripheral portion is greater than a
thickness of the steel frame beam web, and
[0166] a joint surface of the outer peripheral portion, which is
joined to the steel frame beam web, includes a curved surface
(0.ltoreq.radius of curvature.ltoreq.five times the thickness of
the steel frame beam web).
[0167] (Note 3)
[0168] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an outer peripheral portion is butt-welded to
the steel frame beam web,
[0169] an axial length is between 0.5 and 200.0 times a thickness
in a radial direction,
[0170] a length from one end side of the steel frame beam web to
another end of the outer peripheral portion is greater than a
thickness of the steel frame beam web, and
[0171] a joint surface of the outer peripheral portion, which is
joined to the steel frame beam web, includes a first joint surface
(0.ltoreq.length.ltoreq.the thickness of the steel frame beam web)
which is substantially parallel to the radial direction, and a
second joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0172] (Note 4)
[0173] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction,
[0174] an indirect member fillet-welded to the steel frame beam web
is fillet-welded to an outer peripheral portion, and
[0175] a length from one end side of the steel frame beam web to
one end of the indirect member and a length from another end side
of the steel frame beam web to another end of the indirect member
are each at least 0.7 times a thickness of the steel frame beam
web.
[0176] (Note 5)
[0177] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction,
[0178] an indirect member butt-welded to the steel frame beam web
is fillet-welded to an outer peripheral portion,
[0179] a length from one end side of the steel frame beam web to
another end of the indirect member is greater than a thickness of
the steel frame beam web, and
[0180] a joint surface of the indirect member, which is joined to
the steel frame beam web, includes a curved surface
(0.ltoreq.radius of curvature.ltoreq.five times the thickness of
the steel frame beam web).
[0181] (Note 6)
[0182] A steel frame beam-reinforcing metal fixture which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length is between 0.5 and 200.0
times a thickness in a radial direction,
[0183] an indirect member butt-welded to the steel frame beam web
is fillet-welded to an outer peripheral portion,
[0184] a length from one end side of the steel frame beam web to
another end of the indirect member is greater than a thickness of
the steel frame beam web, and
[0185] a joint surface of the indirect member, which is joined to
the steel frame beam web, includes a first joint surface
(0.ltoreq.length.ltoreq.the thickness of the steel frame beam web)
which is substantially parallel to the radial direction, and a
second joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0186] (Note 7)
[0187] A pair of steel frame beam-reinforcing metal fixtures
comprising a first steel frame beam-reinforcing metal fixture and a
second steel frame beam-reinforcing metal fixture, which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length of the first steel frame
beam-reinforcing metal fixture and the second steel frame
beam-reinforcing metal fixture is between 0.5 and 200.0 times a
thickness in a radial direction,
[0188] an indirect member fillet-welded to the steel frame beam web
is fillet-welded to one end of the first steel frame
beam-reinforcing metal fixture and another end of the second steel
frame beam-reinforcing metal fixture, and
[0189] a length from one end side of the steel frame beam web to
one end of the indirect member and a length from another end side
of the steel frame beam web to another end of the indirect member
are each at least 0.7 times a thickness of the steel frame beam
web.
[0190] (Note 8)
[0191] A pair of steel frame beam-reinforcing metal fixtures
comprising a first steel frame beam-reinforcing metal fixture and a
second steel frame beam-reinforcing metal fixture, which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length of the first steel frame
beam-reinforcing metal fixture and the second steel frame
beam-reinforcing metal fixture is between 0.5 and 200.0 times a
thickness in a radial direction,
[0192] an indirect member butt-welded to the steel frame beam web
is fillet-welded to one end of the first steel frame
beam-reinforcing metal fixture and another end of the second steel
frame beam-reinforcing metal fixture,
[0193] a length from one end side of the steel frame beam web to
another end of the indirect member is greater than a thickness of
the steel frame beam web, and
[0194] a joint surface of the indirect member, which is joined to
the steel frame beam web, includes a curved surface
(0.ltoreq.radius of curvature.ltoreq.five times the thickness of
the steel frame beam web).
[0195] (Note 9)
[0196] A pair of steel frame beam-reinforcing metal fixtures
comprising a first steel frame beam-reinforcing metal fixture and a
second steel frame beam-reinforcing metal fixture, which is
substantially fitted to a web opening in a steel frame beam,
characterized in that an axial length of the first steel frame
beam-reinforcing metal fixture and the second steel frame
beam-reinforcing metal fixture is between 0.5 and 200.0 times a
thickness in a radial direction,
[0197] an indirect member butt-welded to the steel frame beam web
is fillet-welded to one end of the first steel frame
beam-reinforcing metal fixture and another end of the second steel
frame beam-reinforcing metal fixture,
[0198] a length from one end side of the steel frame beam web to
another end of the indirect member is greater than a thickness of
the steel frame beam web, and
[0199] a joint surface of the indirect member, which is joined to
the steel frame beam web, includes a first joint surface
(0.ltoreq.length.ltoreq.the thickness of the steel frame beam web)
which is substantially parallel to the radial direction, and a
second joint surface which is inclined at an angle .theta.
(15.ltoreq..theta..ltoreq.80) from the axial direction.
[0200] (Note 10)
[0201] The steel frame beam-reinforcing metal fixture according to
any one of Notes 1 through 9, characterized in that a volume
thereof is between 1.0 and 3.0 times a volume of a space portion
formed in the interior of the web opening.
[0202] (Note 11)
[0203] The steel frame beam-reinforcing metal fixture according to
Note 1, 4, or 7, characterized in that a flange portion having a
larger outer diameter than the web opening is formed on one surface
side in an axial direct ion of the outer peripheral portion.
[0204] (Note 12)
[0205] The steel frame beam-reinforcing metal fixture according to
Note 1, 4, or 7, characterized in that a flange portion having a
larger outer diameter than the web opening is formed on one surface
side in an axial direction of the outer peripheral portion, and
[0206] the outer peripheral portion decreases gradually in diameter
toward the other end side in an axial direction.
[0207] (Note 13)
[0208] The steel frame beam-reinforcing metal fixture according to
Note 1, 4, or 7, characterized in that a flange portion having a
larger outer diameter than the web opening is formed on one surface
side in an axial direct ion of the outer peripheral portion,
and
[0209] a length from a minimum outer diameter portion of the outer
peripheral portion to an outer periphery of the flange portion is
set at no more than half a minimum outer diameter of the outer
peripheral portion, and an axial length of the flange portion is
set at no more than half the axial length of the steel frame
beam-reinforcing metal fixture.
[0210] (Note 14)
[0211] The steel frame beam-reinforcing metal fixture according to
Note 1, 4, or 7, characterized in that a flange portion having a
larger outer diameter than the web opening is formed on one surface
side in an axial direction of the outer peripheral portion,
[0212] the outer peripheral portion decreases gradually in diameter
toward the other end side in an axial direction, and
[0213] a length from a minimum outer diameter portion of the outer
peripheral portion to an outer periphery of the flange portion is
set at no more than half a minimum outer diameter of the outer
peripheral portion, and an axial length of the flange portion is
set at no more than half the axial length of the steel frame
beam-reinforcing metal fixture.
[0214] (Note 15)
[0215] The steel frame beam-reinforcing metal fixture according to
any one of Notes 1 through 9, characterized in that an inner
diameter thereof is set at no more than 0.8 times a length of the
steel frame beam in a height direction.
[0216] (Note 16)
[0217] The steel frame beam-reinforcing metal fixture according to
Note 1, 4, or 7, characterized in that three or more positioning
protruding portions which contact an inner edge portion of the web
opening directly are formed on the outer peripheral portion.
[0218] (Note 17)
[0219] The steel frame beam-reinforcing metal fixture according to
Note 2, 3, 5, 6, 8, or 9, characterized in that three or more
positioning protruding portions which contact an inner edge portion
of the web opening directly are formed on the indirect member.
[0220] (Note 18)
[0221] A steel frame beam web opening reinforcing structure formed
by welding an outer peripheral portion of the steel frame
beam-reinforcing metal fixture according to Note 1, 4, or 7 to a
peripheral edge portion of a web opening formed in a steel frame
beam constituting a column beam joining structure, characterized in
that a distance from a joint position between the column and the
steel frame beam to an axial center of the steel frame
beam-reinforcing structure is set at no more than twice a length of
the steel frame beam in a height direction.
[0222] (Note 19)
[0223] A steel frame beam web opening reinforcing structure formed
by welding an indirect member welded to an outer peripheral portion
of the steel frame beam-reinforcing metal fixture according to Note
2, 3, 5, 6, 8, or 9 to a peripheral edge portion of a web opening
formed in a steel frame beam constituting a column beam joining
structure, characterized in that a distance from a joint position
between the column and the steel frame beam to an axial center of
the steel frame beam-reinforcing structure is set at no more than
twice a length of the steel frame beam in a height direction.
INDUSTRIAL APPLICABILITY
[0224] The steel frame beam-reinforcing metal fixture according to
the present invention may be used on a steel frame beam in an S
structure or a steel frame beam in an SRC structure.
* * * * *