U.S. patent application number 12/088695 was filed with the patent office on 2009-02-12 for composite pillar for junction connections on constructions and building frames.
Invention is credited to Bernard Douet.
Application Number | 20090038263 12/088695 |
Document ID | / |
Family ID | 37943653 |
Filed Date | 2009-02-12 |
United States Patent
Application |
20090038263 |
Kind Code |
A1 |
Douet; Bernard |
February 12, 2009 |
COMPOSITE PILLAR FOR JUNCTION CONNECTIONS ON CONSTRUCTIONS AND
BUILDING FRAMES
Abstract
In order to make available an arrangement for joining a
composite pillar (1) to a beam (9, 10) of a building frame, in
which the composite pillar has at least one vertical steel girder
(2) and a steel enclosure (3) located at least in the connection
region on all sides with a distance from the steel girder, and the
space (4) between the steel girder and the enclosure being filled
with a filler, and a building frame with this arrangement, in which
the force from the beam can be delivered into the composite pillar
both statically and economically, it is suggested that at least one
connecting element (6) which extends between the steel girder and
enclosure is attached to the steel girder and that in the enclosure
in the region of the connecting element there is an opening (11)
through which the beam can be connected to the steel girder.
Inventors: |
Douet; Bernard; (Bordeaux,
FR) |
Correspondence
Address: |
YOUNG & THOMPSON
209 Madison Street, Suite 500
ALEXANDRIA
VA
22314
US
|
Family ID: |
37943653 |
Appl. No.: |
12/088695 |
Filed: |
September 28, 2006 |
PCT Filed: |
September 28, 2006 |
PCT NO: |
PCT/IB2006/003923 |
371 Date: |
August 29, 2008 |
Current U.S.
Class: |
52/841 |
Current CPC
Class: |
E04B 1/30 20130101; E04C
3/34 20130101; E04B 5/43 20130101 |
Class at
Publication: |
52/841 |
International
Class: |
E04B 1/30 20060101
E04B001/30; E04C 3/34 20060101 E04C003/34 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2005 |
AT |
A1598/2005 |
Claims
1. Arrangement for joining a composite pillar (1) to a beam (9, 10)
of a building frame, the composite pillar (1) having at least one
vertical steel girder (2) and a steel enclosure (3) located at
least in the connection region on all sides with a distance from
the steel girder (2), and the space (4) between the steel girder
(2) and the enclosure (3) being filled with a filler such as
concrete, characterized in that at least one connecting element (6)
which extends between the steel girder and enclosure (3) is
attached to the steel girder (2) and that in the enclosure in the
region of the connecting element (6) there is an opening (11)
through which the beam (9, 10) can be connected to the steel
girder.
2. Arrangement as claimed in claim 1, wherein two or more
connecting elements (6) are attached to the steel girder (2) and
extend between the steel girder (2) and enclosure (3) and wherein
in the enclosure (3) in the region of the connecting elements (6)
there are openings (11) through which beams (9, 10) can be
connected to the connecting elements (6).
3. Arrangement as claimed in claim 1, wherein the connecting
element (6) extends as far as the inside surface (8) of the
enclosure (3).
4. Arrangement as claimed in claim 1, wherein the connecting
element (6) is connected to the enclosure (3).
5. Arrangement as claimed in claim 1, wherein a flange (7) is
attached to the end of the connecting element (6) which faces the
enclosure (3).
6. Arrangement as claimed in claim 5, wherein the flange (7) is
connected to the enclosure (3).
7. Arrangement as claimed in claim 3, wherein at least one
connecting bolt, one connecting screw or the like by which the beam
(9, 10) can be connected to the connecting element (6) extends
through the opening (11).
8. Arrangement as claimed in claim 7, wherein there are several
openings (11) and a corresponding number of connecting bolts,
connecting screws or the like per connecting element (6).
9. Building frame with connecting junctions, on which pillars with
beams (9, 10) are connected, at least one pillar being a composite
pillar (1) with at least one vertical steel girder (2) and a steel
enclosure (3) located on all sides with a distance from the steel
girder (2), and the space (4) between the steel girder (2) and the
enclosure (3) being filled with a filler such as concrete, wherein
at least one connecting junction has the arrangement as claimed in
claim 1.
10. Arrangement as claimed in claim 2, wherein the connecting
element (6) extends as far as the inside surface (8) of the
enclosure (3).
11. Arrangement as claimed in claim 2, wherein the connecting
element (6) is connected to the enclosure (3).
12. Arrangement as claimed in claim 3, wherein the connecting
element (6) is connected to the enclosure (3).
13. Arrangement as claimed in claim 2, wherein a flange (7) is
attached to the end of the connecting element (6) which faces the
enclosure (3).
14. Arrangement as claimed in claim 3, wherein a flange (7) is
attached to the end of the connecting element (6) which faces the
enclosure (3).
15. Arrangement as claimed in claim 4, wherein a flange (7) is
attached to the end of the connecting element (6) which faces the
enclosure (3).
16. Arrangement as claimed in claim 4, wherein at least one
connecting bolt, one connecting screw or the like by which the beam
(9, 10) can be connected to the connecting element (6) extends
through the opening (11).
17. Arrangement as claimed in claim 5, wherein at least one
connecting bolt, one connecting screw or the like by which the beam
(9, 10) can be connected to the connecting element (6) extends
through the opening (11).
18. Arrangement as claimed in claim 6, wherein at least one
connecting bolt, one connecting screw or the like by which the beam
(9, 10) can be connected to the connecting element (6) extends
through the opening (11).
Description
[0001] The invention relates to an arrangement for joining a
composite pillar to the beam of a building frame, the composite
pillar having at least one vertical steel girder and a steel
enclosure located at least in the connection region on all sides
with a distance from the steel girder, and the space between the
steel girder and the enclosure being filled with a filler such as
concrete, and a building frame with connecting unctions with this
arrangement.
[0002] In the erection of building frames of reinforced concrete,
composite pillars are known which generally consist of three
components, specifically a girder in the form of a steel profile as
well as concrete and optionally additional reinforcement. In
composite pillars there are various possibilities of forming the
cross section, and fundamentally it is possible to distinguish
between concrete-filled round pipes or hollow sections, steel
profiles with cellular concrete and completely concrete-encased
steel profiles. In steel profiles with cellular concrete the
outside surface of the composite pillar is partially formed by the
steel profile and partially by the concrete. For concrete-encased
steel profiles the steel profile is surrounded on all sides by
concrete.
[0003] The invention conversely relates to concrete-filled round
pipes or hollow sections in which the outside surface of the
composite pillar is formed by the round pipe or hollow section
which thus at the same time constitutes the form for the composite
pillar. Furthermore, in the arrangement as claimed in the invention
within the enclosure in the form of a round pipe or hollow section
there are one or more steel girders, away from which the steel
enclosure is spaced.
[0004] To produce the connecting junctions, in these composite
pillars it was conventional for a long time to attach the beams to
the outer steel enclosure, i.e. to screw or weld them on. The
delivery of force from the beam into the composite pillar therefore
takes place via the enclosure into the reinforced concrete and from
the latter, further into the steel girder, the critical regions of
load transfer constituting the separating surfaces between the
steel and concrete, so that additional measures must be taken to
ensure sufficient load transfer to the separating surfaces.
[0005] AT 405 067 B discloses lining the beams and vertical members
and their connections such that the formwork of the beams and
vertical members and their connections is spaced on all sides so
that the beams and vertical members and their connections are
completely enclosed by concrete.
[0006] The object of the invention is to make available a generic
arrangement and a building frame with such an arrangement in which
the force can be delivered from the beam into the composite pillar
both statically and also in an economically advantageous
manner.
[0007] This object is achieved using an arrangement with the
features of claim 1 and using a building frame with the features of
claim 9.
[0008] In the invention there are connecting elements which are
attached to the steel girder and which extend only within the
enclosure. This makes it possible either to deliver steel girders
to the construction site in which the connecting elements are
already attached, or they can be attached on site to the steel
girders before the enclosure is mounted around the steel girder.
The connecting elements can also be used as spacers for exact
positioning of the enclosure around the steel girder. But
fundamentally it is of course also possible to attach some or all
of the connecting elements only after positioning of the enclosure
if there is sufficient accessibility. In this case the connecting
elements could also project through the opening as far as the outer
periphery of the enclosure.
[0009] Since there is an opening in the region of each connecting
element in the enclosure, the beam can be attached directly to the
connecting element, i.e. screwed or welded to it so that force is
delivered from the beam into the composite pillar directly into the
steel girder. Since the connecting element after filling the cavity
between the steel girder and the enclosure is surrounded by
concrete, the force is also delivered directly into the concrete or
reinforced concrete.
[0010] This construction can be used with special static and
economic advantage in a structure with interpenetrating frame
elements, as is known from AT 405 661 B, since several links to the
connection point of a junction are necessary there and are to be
enclosed with concrete.
[0011] If necessary the connecting element and/or the beam can also
be connected directly to the enclosure so that forces can also be
directly delivered into the enclosure.
[0012] The connecting element advantageously extends directly as
far as the inside surface of the enclosure and closes the opening
so that no additional measures need be taken against the emergence
of concrete in the region of the opening.
[0013] In one preferred embodiment of the invention it can be
provided that a flange is attached to the end of the connecting
element facing the enclosure.
[0014] This flange which preferably adjoins the inside surface of
the enclosure with consideration of production engineering
inaccuracies makes it possible to equalize positioning errors of
the enclosure and manufacturing inaccuracies in the production of
the opening when the area of the flange is greater than the area of
the opening, since the opening then need not be positioned exactly
with reference to the connecting element. Moreover the flange can
facilitate the joining of the connecting element to the enclosure
which is desired under certain circumstances.
[0015] With respect to the opening which is provided for each
connecting element in the enclosure there is either the possibility
of providing a single opening, which is so large that the beam with
its entire connection region can be located within the opening or
can be connected to the connecting element. Alternatively it is
also possible to provide several openings per connecting element,
through which connecting bolts, connecting screws or the like
project, using which the beam is connected to the connecting
element. This embodiment would have the advantage that at the same
time the enclosure would also be fixed and held between the
connecting element and the connection region of the beam. But
fundamentally the latter advantage can also be achieved for only a
single opening when the connecting element or its flange and the
connection region of the beam are larger than the opening.
[0016] In the production of building frames it is generally the
case in the region of the connecting junctions that not only one,
but several beams must be connected in the region of a connecting
junction to a composite pillar. For this case, in the region of the
connecting junction a number of connecting elements and openings
assigned to them which corresponds to the number of beams are
provided in the enclosure to which the beams can be connected.
[0017] Within the framework of the invention it is however also
possible in the region of the connecting junctions to provide for
example four connecting elements on a standard basis, which as
mentioned are used at the same time also as spacers for the
enclosure, if necessary only in the region of those connecting
elements to which beams are to be connected are openings cut out in
the enclosure, conversely in the region of the connecting elements
to which beams need not be connected the enclosure remains closed,
or, if it is prefabricated, is closed.
[0018] Other features and advantages of the invention will become
apparent from the following description of one preferred embodiment
of the invention with respect to the drawings.
[0019] FIG. 1 shows a front view of the connecting junction with an
arrangement as claimed in the invention on a composite pillar
1,
[0020] FIG. 2 shows a top view of the arrangement from FIG. 1 and
FIG. 3 shows a section along line III-III of FIG. 2.
[0021] FIGS. 1 to 3 show one embodiment of a connecting junction on
a composite pillar 1 with an arrangement according to this
invention. The composite pillar in this embodiment is a so-called
double pipe column consisting of a middle tubular steel beam 2 and
a likewise tubular enclosure 3 which is arranged concentrically to
the girder 2 and which likewise consists of steel. The enclosure
can consist of a continuous closed pipe or of a pipe assembled from
several parts. For example the enclosure 3 can consist of two half
shells which are interconnected at two connecting sites which run
lengthwise. Between the girder 2 and the enclosure 3 a space 4 is
formed which for a finished composite pillar is filled with a
filler mass, generally concrete. The cavity 5 within the girder 2
can likewise be filled with concrete. Instead of a tubular girder 2
also any other steel girders, for example extruded profiles,
special rolled steel sections, crossed rolled steel sections of any
shape or polygonal sections can also be used. Instead of hollow
sections or rolled sections, solid sections can also be used as
girders 2. It is common to all embodiments of these sections or
girders that they are spaced apart from the enclosure 3.
[0022] In this embodiment, four connecting elements 6 in the form
of I sections are welded to the girder 2. On the end facing the
enclosure 3, flanges 7, face plates or the like which adjoin the
inside surface 8 of the enclosure 3 are welded to the connecting
element 6. The connecting elements 6 with the flanges 7 thus form
spacers within the space 4 which ensure exact spacing of the
enclosure 3 with reference to the girder 2 on all sides.
[0023] In the region of the junction of the composite pillar 1
shown in FIGS. 1 to 3, two beams 9 and 10 are connected to the
composite pillar 1. For this purpose, on the two connecting
elements 6 assigned to the beams 9 and 10 there are two rectangular
openings 11 in the enclosure 3 which are somewhat smaller than the
flanges 7 from their outside dimensions. For this reason complete
sealing of the opening 11 is also ensured when the opening 11 is
not located exactly in the region of the assigned connecting
element or its flange 7.
[0024] But it is also possible not to close the opening 11 so that
concrete can pass through the opening 11 so that the connecting
element 6 and if present a flange 7 or the like and the connected
beams 9, 10 are completely enclosed by concrete, as is known from
AT 405 067 B. Likewise it is also possible to make further openings
around the connecting region or the opening 11 in the enclosure 3,
through which concrete can pass in order to join the concrete
jacketing of the beam 9, 10.
[0025] On the lower side of the enclosure 3 in FIG. 2 another
opening 11 is shown, since a beam must still be connected to this
connecting element 6. On the top side of the enclosure 3 in FIG. 2
there is no opening 11 since a beam is not to be connected to the
connecting element 6 there.
[0026] The beams 9, 10 can be connected directly to the respective
connecting element 6 with its flange 7 through the openings 11 in
the enclosure 3. In order to connect the beams 9, 10 to the flanges
7, they are welded or screwed to the flanges 7. Since the opening
11 is somewhat larger than the cross section of the beams 9 and 10,
possible inaccuracies in the production or positioning of the beams
9, 10 or of the composite pillar 1 can be equalized here.
[0027] The openings 11 in the enclosure 3 can be prefabricated
before their positioning over the steel girder 2. The openings 11
can however also be cut out only if the enclosure 2 was located
around the steel girder 2 since it is possible in this way to
produce the openings 11 exactly at the locations at which later the
beams 9, 10 are also to be connected.
[0028] It goes without saying that there need not necessarily be
flanges 7 on the connecting elements 6, so that the beams 9, 10 are
attached directly to the connecting elements 6. In this case the
openings 11 would have to be manufactured either so exactly that
when the space 4 is filled with concrete no noteworthy emergence of
concrete takes place, or measures can be easily taken to seal the
remaining spaces of the opening 11.
[0029] The connecting elements 6 and if present their flanges 7 or
the like can likewise be connected to the enclosure 3 for example
by welding or screwing. This can take place either from the outside
through the opening 11 or from the inside, in this case sufficient
accessibility or size of the space 4 between the enclosure 3 and
the girder 2 having to be ensured.
[0030] If necessary, in the space 4 there can additionally be
reinforcement, and the connecting elements 6 can be used in a
practical manner for positioning and attachment of the
reinforcement.
[0031] After attaching the beams 9, 10 to the composite pillar 1
they can be lined and completely or only partially
concrete-encased, depending on for what purpose the beams 9, 10 are
to be subsequently used. The beams 9, 10 can furthermore be not
only beams in the actual sense which lead to other pillars or
composite pillars, but also can be used as a transverse force
connections for flat slab floors or the like.
[0032] It is shown that the beam forces are delivered not only
directly into the girder 2 by the connection of the beams 9, 10 to
the connecting elements 6, but also directly into the concrete or
reinforced concrete which surrounds the girder 2 and in which the
connecting elements 6 are embedded. Optionally, by connecting the
beams 9, 10 and/or the flanges 7 or the connecting elements 6 to
the enclosure 2, forces can be delivered directly into them. Thus,
the disadvantages which are known in comparable composite pillars
of the prior art are avoided, i.e. that the beam forces are
delivered via the enclosure 3 to the concrete and consequently only
then to the steel girder 2.
[0033] Finally, according to one embodiment which is not shown in
the drawings, it is also possible to produce a connection between
the beams 9, 10 and connecting element 6 and flange 7 by for
example holes or openings being made in the enclosure 3 through
which connecting screws or bolts project, using which the
connecting elements 6 or their flanges 7 can be joined directly to
the beams 9, 10, if there are connecting regions configured
accordingly on the beams 9, 10.
* * * * *