U.S. patent application number 11/697412 was filed with the patent office on 2007-10-25 for joint structure for earthquake-resistant member and construction method for the same.
Invention is credited to Yasushi Ichikawa, Akira Wada, Hideaki Yoshikawa.
Application Number | 20070245643 11/697412 |
Document ID | / |
Family ID | 38618102 |
Filed Date | 2007-10-25 |
United States Patent
Application |
20070245643 |
Kind Code |
A1 |
Ichikawa; Yasushi ; et
al. |
October 25, 2007 |
JOINT STRUCTURE FOR EARTHQUAKE-RESISTANT MEMBER AND CONSTRUCTION
METHOD FOR THE SAME
Abstract
Exemplary embodiments of a joint structure for an
earthquake-resistant member can be provided at an intersect portion
of a steel column extending in a substantially vertical direction
and a steel beam extending in a substantially horizontal direction,
and facilitated for joining an earthquake-resistant member to the
intersect portion. The joint structure can include: a first joining
plate located along the steel column without fixing the first
joining plate to the steel column; a second joining plate located
along the steel beam without fixing the second joining plate to the
steel beam; a first movement-restraint member which restrains the
first joining plate; and a second movement-restraint member which
restrains the second joining plate. The earthquake-resistant member
can be joined to the first joining plate and the second joining
plate.
Inventors: |
Ichikawa; Yasushi; (Tokyo,
JP) ; Yoshikawa; Hideaki; (Tokyo, JP) ; Wada;
Akira; (Tokyo, JP) |
Correspondence
Address: |
DORSEY & WHITNEY LLP;INTELLECTUAL PROPERTY DEPARTMENT
250 PARK AVENUE
NEW YORK
NY
10177
US
|
Family ID: |
38618102 |
Appl. No.: |
11/697412 |
Filed: |
April 6, 2007 |
Current U.S.
Class: |
52/167.3 |
Current CPC
Class: |
E04H 9/02 20130101; E04H
9/0237 20200501; E04H 9/028 20130101 |
Class at
Publication: |
052/167.3 |
International
Class: |
E04H 9/02 20060101
E04H009/02 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 7, 2006 |
JP |
P2006-106342 |
Claims
1. A joint structure associated with an earthquake-resistant member
situated at and configured to join an intersect portion of a steel
column which extends in a substantially vertical direction and a
steel beam which extends in a substantially horizontal direction,
the joint structure comprising: a first joining plate located
approximately along and without being fixed to the steel column; a
second joining plate located approximately along and without being
fixed to the steel beam; a first movement-restraint member provided
on the steel column and configured to contact an end portion of the
first joining plate, the first movement-restraint member
restraining the first joining plate such that the first joining
plate is substantially limited from moving in the direction of the
steel column; and a second movement-restraint member provided on
the steel beam so as to contact an end portion of the second
joining plate, the second movement-restraint member restraining the
second joining plate such that the second joining plate is
substantially limited from moving in the direction of the steel
beam, wherein the earthquake-resistant member is joined to the
first joining plate and the second joining plate.
2. The joint structure according to claim 1, wherein, when a
compression force acts on the earthquake-resistant member, the
compression force transmits to the steel column through the first
joining plate as a bearing force and transmits to the steel beam
through the second joining plate as a bearing force.
3. The joint structure according to claim 1, wherein, when a
tensile force acts on the earthquake-resistant member, the tensile
force is transmitted to the steel column through the first joining
plate and the first movement-restraint member, and to the steel
beam through the second joining plate and the second
movement-restraint member.
4. The joint structure according to claim 1, wherein: a notch
provided at an end portion of the first joining plate which
contacts the first movement-restraint member, and the first
movement-restraint member is engaged with the notch of the first
joining plate.
5. The joint structure according to claim 1, wherein a notch is
provided at an end portion of the second joining plate which
contacts the second movement-restraint member, and the second
movement-restraint member is engaged with the notch of the second
joining plate.
6. The joint structure according to claim 1, wherein the first
movement-restraint member comprises: a main body fixed to the steel
column, and a stiffening rib disposed on an upper surface of the
main body so as to be in a vicinity of the end portion of the first
joining plate.
7. The joint structure for an earthquake-resistant member according
to claim 1, wherein the second movement-restraint member comprises:
a main body fixed to the steel beam, and a stiffening rib disposed
on an upper surface of the main body so as to be in a vicinity of
the end portion of the second joining plate.
8. A construction method for a joint structure associated with an
earthquake-resistant member for joining an earthquake-resistant
member to an intersect portion of a steel column extending in a
substantially vertical direction and a steel beam extending in a
substantially horizontal direction, the construction method
comprising: locating a first joining plate along the steel column
without fixing the first joining plate to the steel column; fixing
a first movement restraint member to the steel column so as to
contact an end portion of the first joining plate; locating a
second joining plate along the steel beam without fixing the second
joining plate to the steel beam; fixing a second movement restraint
member to the steel beam so as to contact an end portion of the
second joining plate; and joining the earthquake-resistant member
to the first joining plate and the second joining plate; wherein:
the first movement-restraint member restrains the first joining
plate such that the first joining plate is substantially limited
from moving in the direction of the steel column, and the second
movement-restraint member restrains the second joining plate so
that the second joining plate is substantially limited from moving
in the direction of the steel beam.
9. A joint structure associated with an earthquake-resistant member
situated at and configured to join an intersect portion of a steel
column which extends in a substantially vertical direction and a
steel beam which extends in a substantially horizontal direction,
the joint structure comprising: a joining plate located
approximately along and without being fixed to one of the steel
column or the steel beam; and a movement-restraint member provided
on the at least particular one of the steel column or the steel
beam, and configured to contact an end portion of the joining
plate, the movement-restraint member restraining the joining plate
such that the joining plate is substantially limited from moving in
the direction of the one of the steel column or the steel beam,
wherein the earthquake-resistant member is joined to the joining
plate and another one of the steel column and the steel beam.
10. A construction method for a joint structure associated with an
earthquake-resistant member for joining an earthquake-resistant
member to an intersect portion of a steel column extending in a
substantially vertical direction and a steel beam extending in a
substantially horizontal direction, the construction method
comprising: locating a joining plate along one of the steel column
or the steel beam without fixing the first joining plate to the one
of the steel column or the steel beam; fixing a movement-restraint
member to the one of the steel column or the steel beam so as to
contact an end portion of the joining plate; and joining the
earthquake-resistant member to the joining plate and another one of
the steel column or the steel beam; wherein the first
movement-restraint member restrains the joining plate so that the
joining plate is substantially limited from moving in the direction
of the one of the steel column or the steel beam.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] The present application claims priority from Japanese Patent
Application No. 2006-106342, filed Apr. 7, 2006, the entire
disclosures and content of which is incorporated herein by
reference.
FIELD OF THE INVENTION
[0002] The present invention relates to a joint structure for an
earthquake-resistant member and a method for producing the
same.
BACKGROUND INFORMATION
[0003] For an earthquake strengthening method for a structure,
joining an earthquake resisting element such as a brace to an
intersect portion of a column and a beam can be generally
established.
[0004] Conventionally, in a case where the brace is joined to the
intersect portion of the column and the beam, a gusset plate can
generally be disposed between the intersect portion and the brace.
For example, Japanese Unexamined Patent Application, First
Publication No. 2000-186371 describes a joint structure including a
column side gusset plate 110 which can be disposed on a column 101
and provided for joining the column 101 to a brace member 103. A
beam side gusset plate 111 can be disposed on a beam 102 and may be
provided for joining the beam 102 to the brace member 103 is
disclosed. Such exemplary arrangement is shown in FIG. 10.
[0005] The column side gusset plate 110 has an elongate-rectangular
shape in a square view, and the beam side gusset plate 111 also has
an elongate-rectangular shape in a square view. The column side
gusset plate 110 protrudes from a steel tubing web toward the brace
member 103 so that the tip of the column side gusset plate 110 is
tapered. The beam side gusset plate 111 protrudes from the middle
of the upper portion of an H-section steel forming the beam 102
vertically upward. When the column is a steel tube, the column side
gusset plate 110 is welded to the column 101, and the beam side
gusset plate 111 is welded to the beam 102. A gusset plate 112
having an end plate 108 can be joined to an end portion of the
brace member 103.
[0006] When joining members (e.g., the column side gusset plate and
the beam side gusset plate) are welded to the intersect portion of
the column and the beam, the deformation of the column and the beam
is restrained. Therefore, the deformation property of the entire
steel structure can become low. According to the Japanese
earthquake-resistant standard, if the deformation property becomes
high, the deformability and damping factor of structure (value of
Ds) can be improved. Thus, may be is possible to decrease shear
force of an earthquake in the secondary seismic design.
[0007] Generally, the structure of a pure moment resisting frame
should withstand a large story-deformation angle to reduce the
shear force of the earthquake. The story-deformation angle is a
rate of the relative story displacement in the horizontal direction
of each of the floors to the height of the relevant floor. For
example, as shown in FIG. 11, when the relative story displacement
in the horizontal direction is .delta., and the height of the
relevant floor is h, then the story-deformation angle is
represented by .delta./h (rad).
[0008] For instance, a moment resisting frame including braces can
occasionally need to withstand the same story-deformation angle.
Specifically, when the brace is a buckling restraint brace, the
same story-deformation angle should be used.
[0009] If the steel structure is a pure moment resisting frame, the
steel structure can withstand a large story-deformation angle as a
result of using suitable welding. However, when a gusset plate for
the brace is attached to the steel structure of the moment
resisting frame, the flexible length of a column or a beam can
become short, and stress concentration may occur at an end of the
gusset plate. Therefore, the steel structure can hardly obtain the
high deformation property so as to withstand the large
story-deformation angle.
[0010] Accordingly, there is a need to overcome the deficiencies as
described herein above.
OBJECTS AND SUMMARY OF EXEMPLARY EMBODIMENTS
[0011] One of the exemplary objects of the present invention is to
solve the above-described problem and provide a joint structure for
an earthquake-resistant member and a construction method for the
same which provides an improvement of the earthquake resistance of
the structure as a result of enlarging the story-deformation angle
in the joint structure of an earthquake-resistant member such as a
brace and an intersect portion of a column and a beam.
[0012] The first exemplary embodiment of the joint structure for an
earthquake-resistant member according to the present invention is
provided at an intersect portion of a steel column extending in a
substantially vertical direction and a steel beam extending in a
substantially horizontal direction, and is for joining an
earthquake-resistant member to the intersect portion. The exemplary
joint structure of the present invention can include: a first
joining plate located along the steel column without fixing the
first joining plate to the steel column; a second joining plate
located along the steel beam without fixing the second joining
plate to the steel beam; a first movement-restraint member provided
on the steel column so as to contact an end portion of the first
joining plate, and which restrains the first joining plate so that
the first joining plate does not move in the direction of the steel
column; and a second movement-restraint member provided on the
steel beam so as to contact an end portion of the second joining
plate, and which restrains the second joining plate so that the
second joining plate does not move in the direction of the steel
beam. The earthquake-resistant member is joined to the first
joining plate and the second joining plate.
[0013] The second exemplary embodiment of the joint structure for
an earthquake-resistant member according to the present invention
can be provided at a intersect portion of a steel column extending
in a substantially vertical direction and a steel beam extending in
a substantially horizontal direction, and is used for joining an
earthquake-resistant member to the intersect portion. The exemplary
joint structure of the present invention can include: a first
joining plate located along one of the steel column and the steel
beam without fixing the first joining plate to the one; and a first
movement-restraint member provided on the one so as to contact with
an end portion of the first joining plate, and which restrains the
first joining plate so that the first joining plate does not move
in the direction of the one. The earthquake-resistant member can be
joined to the first joining plate and the other of the steel column
and the steel beam.
[0014] The first exemplary embodiment of the construction method
for a joint structure of an earthquake-resistant member according
to the present invention can be for joining an earthquake-resistant
member to an intersect portion of a steel column extending in a
substantially vertical direction and a steel beam extending in a
substantially horizontal direction. The exemplary construction
method of the present invention can include: locating a first
joining plate along the steel column without fixing the first
joining plate to the steel column; fixing the first
movement-restraint member to the steel column so as to contact an
end portion of the first joining plate; locating a second joining
plate along the steel beam without fixing the second joining plate
to the steel beam; fixing the second movement-restraint member to
the steel beam so as to contact an end portion of the second
joining plate; and joining the earthquake-resistant member to the
first joining plate and the second joining plate. The first
movement-restraint member restrains the first joining plate so that
the first joining plate does not move in the direction of the steel
column, and the second movement-restraint member restrains the
second joining plate so that the second joining plate can be
prevented or limited from moving in the direction of the steel
beam.
[0015] The second exemplary embodiment of the construction method
for a joint structure of an earthquake-resistant member according
to the present invention can be for joining an earthquake-resistant
member to an intersect portion of a steel column extending in a
substantially vertical direction and a steel beam extending in a
substantially horizontal direction. The exemplary construction
method of the present invention can include: locating a first
joining plate along one of the steel column and the steel beam
without fixing the first joining plate to the one; fixing the first
movement-restraint member to the one so as to contact an end
portion of the first joining plate; and joining the
earthquake-resistant member to the first joining plate and the
other of the steel column and the steel beam. The first
movement-restraint member may restrain the first joining plate so
that the first joining plate can be prevented or limited from
moving in the direction of the one.
[0016] According to one exemplary embodiment of the present
invention, since the second joining plate contacts the steel beam
without being fixed to the steel beam, if a large earthquake occurs
and when the steel beam is bent vertically by a force of the
earthquake, the steel beam may not be restrained by the second
joining plate. Therefore, the deformation property of the steel
beam can be improved, and thereby the steel structure can withstand
a large story-deformation angle.
[0017] Similarly, since the first joining plate just contacts the
steel column without being fixed to the steel column, if the steel
column is bent horizontally by the force of the earthquake, the
steel column is not restrained by the first joining plate.
Therefore, the deformation property of the steel column is
improved, and thereby the entire steel structure can obtain
remarkable deformation property.
[0018] These and other objects, features and advantages of the
present invention will become apparent upon reading the following
detailed description of embodiments of the invention, when taken in
conjunction with the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Further objects, features and advantages of the invention
will become apparent from the following detailed description taken
in conjunction with the accompanying figures showing illustrative
embodiments of the invention, in which:
[0020] FIG. 1 is a side view showing a first exemplary embodiment
of a joint structure for an earthquake-resistant member according
to the present invention;
[0021] FIG. 2 is a sectional view taken along a line A-A of the
joint structure shown in FIG. 1;
[0022] FIG. 3 is a sectional view taken along a line B-B of the
joint structure shown in FIG. 1;
[0023] FIG. 4 is a view illustrating exemplary effects of the joint
structures shown in FIG. 1;
[0024] FIG. 5 is a view showing a second exemplary embodiment of
the joint structure for the earthquake-resistant member according
to the present invention;
[0025] FIG. 6 is a sectional view taken along a line C-C of the
joint structure shown in FIG. 5;
[0026] FIG. 7 is a sectional view taken along a line D-D of the
joint structure shown in FIG. 5;
[0027] FIG. 8 is a view showing a third exemplary embodiment of the
joint structure for the earthquake-resistant member according to
the present invention;
[0028] FIG. 9 is a view showing a fourth exemplary embodiment of
the joint structure for the earthquake-resistant member according
to the present invention;
[0029] FIG. 10 is a view illustrating the effects provided by a
conventional joint structure; and
[0030] FIG. 11 is a view illustrating the effects of a
story-deformation angle of an exemplary steel structure.
[0031] Throughout the figures, the same reference numerals and
characters, unless otherwise stated, are used to denote like
features, elements, components or portions of the illustrated
embodiments. Moreover, while the subject invention will now be
described in detail with reference to the figures, it is done so in
connection with the illustrative embodiments. It is intended that
changes and modifications can be made to the described embodiments
without departing from the true scope and spirit of the subject
invention as defined by the appended claims.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0032] Hereunder, exemplary embodiments of the joint structure for
an earthquake-resistant member and construction method for the
joint structure in a reinforced structure will be explained with
reference made to the figures.
First Exemplary Embodiment
[0033] FIGS. 1-3 show an exemplary embodiment of an intersect
portion of a steel column 1 formed by a square-shaped steel tube
and a steel beam 2 which is formed by an H-section steel. The joint
structure of this exemplary embodiment can include a connector 5
for connecting an earthquake-resistant member 4, such as a brace to
the intersect portion of the steel column 1 and the steel beam 2.
The connector 5 can include a first joining plate 6 which contacts
a side surface of the steel column 1, a second joining plate 7 put
on the steel beam 2, and a gusset plate 8 welded to the first
joining plate 6 and the second joining plate 7 so as to be at least
approximately orthogonal to each of the first joining plate 6 and
the second joining plate 7. The earthquake-resistant member 4 can
be connected to the gusset plate 8 through a splice plate 10 using
connecting bolts 11.
[0034] The first joining plate 6 is preferably not fixed to the
steel column 1 by, e.g., welding and preferably only contacts the
steel column 1. Similarly, the second joining plate 7 is preferably
not fixed to the steel beam 2 by, e.g., welding but preferably only
contacts the steel beam 2. For example, the connector 5 can be
provided for transmitting the pulling force acting on the
earthquake-resistant member 4 at the time of an earthquake or the
like to the steel column 1 and the steel beam 2. Therefore, the
connector 5 should be fixed to both of the steel column 1 and the
steel beam 2. Since preferably only the first joining plate 6 and
the second joining plate 7 respectively contact the steel column 1
and the steel beam 2 without being fixed to them, the pulling force
acting from the earthquake-resistant member 4 would preferably not
be transmitted to the steel column 1 and the steel beam 2.
[0035] Consequently, the pulling force acting from the
earthquake-resistant member 4 can be divided between the vertical
force acting in a direction of pulling up the connector 5 and the
horizontal force acting in the horizontal direction when the
pulling force acts on the connector 5. For example, according to
this exemplary embodiment, a member which can resist the vertical
force and another member which can resist the horizontal force may
be respectively disposed to the steel column 1 and the steel beam
2. As a result, the vertical force can be transmitted to the steel
column 1 as axial force of the column 1, and the horizontal force
can be transmitted to the steel beam 2 as axial force of the beam
2.
[0036] In particular, a first movement-restraint member 14 can be
fixed to a side surface of the steel column 1. The first
movement-restraint member 14 can be located so as to contact an end
portion 6a of the first joining plate 6. In addition, a second
movement-restraint member 15 may be fixed to an upper side surface
of the steel beam 2. The second movement-restraint member 15 can be
located so as to contact an end portion 7a of the second joining
plate 7.
[0037] Each of the first movement-restraint member 14 and the
second movement-restraint member 15 can be formed by a rectangular
steel plate which may have a predetermined thickness and a
predetermined size (e.g., square). The first movement-restraint
member 14 may be fixed to the steel column 1 by, e.g., fillet
welding 41, and the second movement-restraint member 15 can be
fixed to the steel beam 2 by, e.g., the fillet welding 41. It
should be understood that other arrangements, including but not
limited to a fastening device, such as a bolt, may be used as
instead of the fillet welding 41.
[0038] The vertical force acting on the end portion 6a of the first
joining plate 6 can be loaded to an end portion 16 of the first
movement-restraint member 14. Therefore, it may be preferable that
the first joining plate 6 and the first movement-restraint member
14 be located so that an end surface of the first joining plate 6
can closely contact an end surface of the first movement-restraint
member 14. Further, the horizontal force acting on the end portion
7a of the second joining plate 7 is loaded to an end portion 17 of
the second movement-restraint member 15. Therefore, it is
preferable that the second joining plate 7 and the second
movement-restraint member 15 be located so that an end surface of
the second joining plate 7 can closely contact an end surface of
the second movement-restraint member 15.
[0039] In the joint structure of this exemplary embodiment as
discussed above, when the pulling force acts on the
earthquake-resistant member 4 such as the brace at the time of an
earthquake, the vertical force can act on the first joining plate 6
and the horizontal force may act on the second joining plate 7
based on the pulling force. The vertical force acting on the first
joining plate 6 may be loaded to the first movement-restraint
member 14, and then the first movement-restraint member 14 can
transmit the vertical force to the steel column 1 as the axial
force thereof. The horizontal force acting on the second joining
plate 7 may be loaded to the second movement-restraint member 15,
and then the second movement-restraint member 15 can transmit the
horizontal force to the steel beam 2 as the axial force thereof.
For example, when the pulling force acts on the
earthquake-resistant member 4, the reinforced structure can accept
the vertical force acting on the connector 5 based on the pulling
force as the axial force of the steel column 1. Similarly, the
reinforced structure can accept the horizontal force acting on the
connector 5 based on the pulling force as the axial force of the
steel beam 2.
[0040] Further, the earthquake-resistant member 4 can contact the
steel column 1 through the first joining plate 6 of the connector
5, and may contact the steel beam 2 through the second joining
plate 7 of the connector 5. Therefore, when a compression force
acts on the earthquake-resistant member 4, the force acting on the
connector 5 on the ground of the compression force can be
transmitted to the steel column 1 and the steel beam 2, which may
form structural members, e.g., such as a bearing force.
[0041] The vertical force of the bearing force transmitted to the
structural members can be transmitted to the steel column 1 through
the web of the steel beam 2. Therefore, the steel beam 2 located in
the vicinity of the connection portion of the column and the beam
should preferably have sufficient strength and rigidity so that the
vertical force of the bearing force can transmit from the beam to
the column. It is possible for the web of the steel beam 2 to be
reinforced.
[0042] According to this exemplary embodiment of the joint
structure as described above, since the second joining plate 7
preferably only contacts the steel beam 2 without being fixed to
the steel beam 2, if a large earthquake occurs and when the steel
beam 2 is bent vertically by a force of the earthquake, the steel
beam 2 would likely not be restrained by the connector 5.
Therefore, the deformation property of the steel beam can be
improved. Similarly, since the first joining plate 6 preferably
just contacts the steel column 1 without being fixed to the steel
column 1, if the steel column 1 is bent horizontally by the force
of the earthquake, the steel column 1 would likely not be
restrained by the connector 5. Therefore, the deformation property
of the steel column 1 can be improved.
[0043] FIG. 4 shows the exemplary intersect portion of the column
and the beam when a large earthquake occurs and the structure
deforms in the horizontal direction. Since the second joining plate
7 can contact the steel beam 2 without being fixed to the steel
beam 2, the steel beam 2 (which is bent vertically by a force of
the earthquake) would likely not be restrained by the connector 5.
Therefore, the steel beam 2 can follow the deformation of the
structure without breaking and cracking until a large
story-deformation angle is generated. Similarly, when the steel
column 1 is bent horizontally, since the first joining plate 6 can
contact the steel column 1 without being fixed to the steel column
1, the steel column 1 (which is bent horizontally by a force of the
earthquake) would likely not be restrained by the connector 5.
[0044] For example, if the connector 5 is conventionally fixed to
the intersect portion of the steel column 1 and the steel beam 2,
the steel column 1 and the steel beam 2 can be restrained by the
connector 5 so as to hardly deform, and then the rigidity of the
steel column 1 and the steel beam 2 by appearance can become high.
However, the deformation property of the steel column 1 and the
steel beam 2 can become low. According to this exemplary
embodiment, the first joining plate 6 can contact the steel column
1 without being fixed to the steel column 1, and the second joining
plate 7 may contact the steel beam 2 without being fixed to the
steel beam 2. Therefore, the deformation property of the steel
column 1 and the steel beam 2 may be improved. As a result, the
earthquake resistance can also be improved.
[0045] According to this exemplary embodiment the joint structure
described above, when the compression force acts on the
earthquake-resistant member 4, the force acting on the connector 5
based on the compression force can be transmitted to the steel
column 1 and the steel beam 2 (which form structural members) as
bearing force. Further, when the pulling force acts on the
earthquake-resistant member 4, the steel column 1 can accept the
vertical force acting on the connector 5 based on the pulling force
as the axial force of the steel column 1, and the steel beam 2 can
accept the horizontal force acting on the connector 5 based on the
pulling force as the axial force of the steel beam 2. Therefore, if
the exemplary construction described above is utilized so as to
focus on the earthquake resistance, negative effects due to the
construction can be removed or reduced.
Second Exemplary Embodiment
[0046] With respect to FIGS. 5-7, if a large earthquake occurs and
when the steel beam 2 is bent vertically (as shown in FIG. 4),
stiffening ribs 20 may be respectively disposed on an upper surface
of the first movement-restraint member 14 and an upper surface of
the second movement-restraint member 15. The stiffening rib 20 of
the first movement-restraint member 14 can prevent the first
movement-restraint member 14 from focally bending by the horizontal
force acting on the end portion 16 of the first movement-restraint
member 14. The stiffening rib 20 of the second movement-restraint
member 15 can prevent the second movement-restraint member 15 from
focally bending by the upward force acting on the end portion 17 of
the second movement-restraint member 15.
Third Exemplary Embodiment
[0047] As shown in FIG. 8, a notch 26 can be formed at the end
portion 7a of the second joining plate 7, and the second
movement-restraint member 15 may be engaged with the notch 26.
Therefore, it is possible to prevent and/or limit the second
movement-restraint member 15 from separating from the plane of
structure of the earthquake-resistant member 4. For example, FIG. 8
shows that the notch 26 can be formed at the end portion 7a of the
second joining plate 7, which contacts the steel column 25. It
should be understood that a notch 26 can be formed at the end
portion 6a of the first joining plate 6, and the first
movement-restraint member 14 may be engaged with the notch 26.
Therefore, it is possible to prevent and/or limit the first
movement-restraint member 14 from separating from the plane of
structure of the earthquake-resistant member 4. Further, in this
exemplary embodiment, the steel column 25 can be formed by the
H-section steel. It should be understood that the shape of the
column and the beam is not limited.
Fourth Exemplary Embodiment
[0048] FIG. 9 shows that the second joining plate 7 and the first
movement-restraint member 15 can be removed, and the gusset plate 8
may be fixed to the upper surface of the steel beam 2 by, e.g.,
welding. The first joining plate 6 is preferably not fixed to the
steel column 1, and likely only contacts the steel column 1.
According to this exemplary embodiment, the first joining plate 6
may contact the steel column 1 without being fixed to the steel
column 1, and thereby the deformation property of the steel column
1 may be improved. As a result, the earthquake resistance can also
be improved.
[0049] As shown in the exemplary embodiment of FIG. 9, the first
joining plate 6 is preferably not fixed to the steel column 1, and
the gusset plate 8 can be preferably fixed to the steel beam 2. It
should be understood that the second joining plate 7 should be
unfixed to the steel beam 2, and the gusset plate 8 can be fixed to
the steel column 1. Therefore, the deformation property of the
steel beam 2 may be improved. As a result, the earthquake
resistance can also be improved.
[0050] The foregoing merely illustrates the principles of the
invention. Various modifications and alterations to the described
embodiments will be apparent to those skilled in the art in view of
the teachings herein. It will thus be appreciated that those
skilled in the art will be able to devise numerous systems,
structures, arrangements and methods which, although not explicitly
shown or described herein, embody the principles of the invention
and are thus within the spirit and scope of the present invention.
In addition, to the extent that the prior art knowledge has not
been explicitly incorporated by reference herein above, it is
explicitly being incorporated herein in its entirety. All
publications referenced herein above are incorporated herein by
reference in their entireties.
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