JP3584735B2 - Connection structure of braced beams and beam-to-column joints - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a brace to a beam-to-column joint (including a column base) of a building having a steel frame structure, and to a beam-to-column joint hardware capable of joining a brace.
[0002]
[Prior art]
Conventionally, bracing of a frame (including a horizontal bracing) is generally performed by welding a gusset plate or the like to a column or a beam (including a foundation beam) and attaching the gusset plate to the gusset plate (FIG. 4). (A), see FIG. 5 (a)).
[0003]
[Problems to be solved by the invention]
FIG. 4 (a) shows a case where a gusset plate 5 is welded to attach a bracing 6 at a conventional joint portion between a foundation beam 2 and a column 1, and distortion of a material due to welding heat when the gusset plate 5 is attached is shown. Generation is unavoidable, it takes time to remove the distortion, and the distortion sometimes remains without being completely removed. Also, it takes time to manufacture the gusset plate.
FIG. 5A shows a case where a gusset plate 9 is welded to a beam 7 and a horizontal bracing 8 is attached to a conventional joint portion between a column 1 and a beam 7. There is a problem such as distortion due to welding of the beam 7.
[0004]
On the other hand, as shown in FIG. 4 (b), it is conceivable to directly attach the brace 6 without using a gusset plate on the flange of the column 1. However, when the brace 6 is directly attached, split tees or the like are used. Because of the position avoiding the metal joint 13 formed of the braces 6, a large bending moment is generated in the column 1 and the metal joint 13 by the axial force from the braces 6 due to the tensile force or the compressive force from the braces 6.
[0005]
Similarly, as shown in FIG. 5B, when the horizontal bracing 8 is directly attached to the beam 7 without using a gusset plate, the gap between the core of the horizontal bracing 8 and the core of the column 1 becomes large, and A large bending moment in the horizontal plane is generated in the beam 7, the metal joint 13, and the column 1 by the axial force from the bracing 8.
[0006]
The present invention has been made to solve the above-described problems in the prior art, and does not require a gusset plate when attaching a brace to a beam-column joint using a joint metal such as a split tee. It is an object of the present invention to provide a joining structure and a joining hardware capable of attaching a paddle to a position near a core of a column or a beam.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 of the present application is characterized in that one surface of the flange of a T-shaped cross-section fitting consisting of a web and a flange is joined to the surface of one flange of a column and a beam as a steel frame member, In the joint structure of the brace to a beam-column joint formed by joining the surface of the other flange of the column and the beam to one surface , the width of the web of the metal joint is adjusted to the column or the beam to be joined to one surface of the web of larger than the width of the flange, and wherein the bonding the brace end to the pillar or beam width than the spread outer part of the web.
[0008]
As the metal joint having a T-shaped cross section, a material obtained by processing a so-called split tee conventionally used for a column-beam joint can be used, but the method of manufacturing the metal joint is not particularly limited.
[0009]
As the column of the steel frame member, an H-section steel is generally used, but a combination of a square steel pipe and a channel steel may be used, and there is no particular limitation. Similarly, the beam is not necessarily limited to the H-beam.
[0010]
In addition, the beams referred to here include not only ordinary beams in a column-beam frame but also foundation beams and the like. The bracing is not limited to the bracing used in a vertical structure, but also includes the horizontal bracing.
[0011]
The joint between the column and the beam and the metal joint is usually performed by high-strength bolt joint, but may be joint using a joint fitting other than the high-strength bolt.
[0012]
The beam-to-column joint according to claim 2 of the present application is a beam-to-column joint used in the above-described beam-to-column joint connecting structure according to claim 1, and is a T-shaped joint comprising a web and a flange. have a cross section, one side of the flange is bonded to the surface of one of the flanges of the columns and beams as steel shaft assembly member, and so as to bond the columns and beams other surface of the flanges on one side of said web In a beam-and-column joint metal fitting, the width of the web is made larger than the width of a flange of a column or beam to be joined to one surface of the web , and a portion of the web extending outside the width of the flange of the column or beam is braced. It is characterized in that it is a part.
[0013]
In other words, the width of the conventional beam-to-column joint made of split tee or the like is made wider than the width of the column or beam to be joined, and a bracing can be attached to that portion.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1A and 1B show an embodiment in which the present invention is applied to a joint between a foundation beam 2 and a column 1. FIG. 1A is a front view, and FIG. 1B is a side view.
[0015]
In this example, with regard to the joint between the foundation beam 2 and the column 1, the flange 3b of a pair of joining hardware 3 made of split tees is joined to the upper surface of the flange of the foundation beam 2 made of H-section steel with high-strength bolts or the like, and the two joints are made. The column 1 made of H-shaped steel is sandwiched between the webs 3a of the metal member 3, and the web 3a of the joint metal member 3 and the flange of the column 1 are joined by a high-strength bolt or the like.
[0016]
The width of the web 3a of the metal joint 3 made of the split tee is sufficiently larger than the width of the column 1 (corresponding to the flange width in this example). To join. This joining can be performed with a high-strength bolt or the like, but welding or the like may be used as long as it does not affect the beam-column joint.
[0017]
In the illustrated example, the width of the metal joint 3 is the same from the web 3a to the flange 3b. However, the width of the web 3a alone may be increased.
[0018]
On the other hand, in the case of FIG. 4A described above, the gusset plate 5 is welded to the foundation beam 2 and the bracing 6 is attached, so that the time required for manufacturing the gusset plate 5 and the distortion generated by welding to the foundation beam 2 are increased. And the like.
[0019]
In addition, as shown in FIG. 4 (b), when the bracing 6 is directly attached to the flange of the column 1 without using a gusset plate, the gap between the core of the bracing 6 and the core of the foundation beam 2 increases, Due to the axial force from the paddle 6, a large bending moment is generated in the joint metal 13 including the column 1 and the split tee.
[0020]
FIG. 2 is a plan view of an embodiment in which the present invention is applied to a joint between a column 1 and a beam 2.
[0021]
In this example, a flange 3b of a joint metal member 3 made of split tee is joined to a flange surface of a column 1 made of an H-shaped steel with a high-strength bolt 4 at a joint portion between the column 1 and the beam 7, and a web 3a of the joint metal member 3 is connected to the web 3a. The flange of the beam 7 is joined with the high-strength bolt 4.
[0022]
The width of the web 3a of the metal joint 3 made of the split tee is set to be sufficiently larger than the width of the beam 7 (corresponding to the flange width in this example). Join the parts. This joining can be performed with a high-strength bolt or the like, but may be performed by welding or the like.
[0023]
On the other hand, in the case of FIG. 5A described above, the gusset plate 9 is welded to the beam 7 and the horizontal bracing 8 is attached, so that the time required for manufacturing the gusset plate 9 and the distortion generated by welding to the beam 7 are reduced. And the like.
[0024]
When the horizontal braces 8 are directly attached to the beams 7 without using a gusset plate as shown in FIG. 5B, the gap between the core of the horizontal braces 8 and the core of the column 1 becomes large, and Due to the axial force from the paddle 8, a large bending moment in the horizontal plane is generated in the joint metal 13 and the column 1 including the beam 7 and the split tee.
[0025]
FIGS. 3A and 3B show an embodiment in which the present invention is applied to a joint between a column 1 and a beam 7 of a so-called beam-through frame, wherein FIG. 3A is a front view and FIG. 3B is a side view. .
[0026]
In this example, with respect to the joint between the column 1 and the beam 7, the flanges 3b of the pair of joining hardware 3 made of split tees are respectively joined to the upper and lower flange surfaces of the beam 7 made of H-shaped steel with high-strength bolts or the like. The column 1 made of H-section steel is sandwiched between the webs 3a of the metal joint 3 and joined with high-strength bolts or the like.
[0027]
The width of the web 3a of the metal joint 3 made of the split tee is sufficiently larger than the width of the column 1 (corresponding to the flange width in this example). To join. This joining can be performed with a high-strength bolt or the like, but may be performed by welding or the like.
[0028]
In the above embodiment, the column 1, the foundation beam 2, the beam 7, and the like are H-shaped steel. However, the invention is not limited to the H-shaped steel, and may be a square steel pipe or the like.
[0029]
【The invention's effect】
{Circle around (1)} The present invention does not require a gusset plate to join the braces, so that the amount of steel material and the number of manufacturing steps can be reduced.
{Circle over (2)} Since it is not necessary to directly weld the gusset plate or the bracing to the frame member made of H-section steel or the like, occurrence of welding distortion can be avoided.
{Circle around (3)} According to the joint structure of the present invention, the bracing can be attached in a state where it is close to the core of the column or the core of the beam.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, wherein (a) is a front view and (b) is a side view.
FIG. 2 is a plan view showing another embodiment of the present invention.
FIGS. 3A and 3B show still another embodiment of the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view.
4A and 4B show a comparative example with the embodiment of FIG. 1, wherein FIG. 4A is a front view of a joining structure using a conventional gusset plate, and FIG. 4B is a front view when no gusset plate is used. is there.
5A and 5B show a comparative example with the embodiment of FIG. 2, wherein FIG. 5A is a front view of a joining structure using a conventional gusset plate, and FIG. 5B is a front view when no gusset plate is used. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... pillar, 2 ... foundation beam, 3 ... joint metal, 3a ... web, 3b ... flange, 4 ... high strength bolt, 5 ... gusset plate, 6 ... bracing, 7 ... beam, 8 ... horizontal bracing, 9 ... Gusset plate, 13 ... conventional joint hardware

Claims (2)

One surface of the flange of the T-shaped cross-section joint consisting of a web and a flange is joined to the surface of one flange of a column and a beam as a steel frame member, and the other surface of the column and the beam is joined to one surface of the web. In a joint structure of a strut to a beam-column joint portion formed by joining surfaces of flanges , the width of the web of the metal joint is larger than the width of a flange of a column or a beam joined to one surface of the web, A strut-joining structure for joining a strut to a beam-column joint , wherein a strut end is joined to a portion extending outside the width of the column or the beam. It has a T-shaped cross section composed of a web and a flange, and one surface of the flange is joined to the surface of one flange of a column and a beam as a steel frame member, and the other flange of the column and the beam is joined to one surface of the web in column joining hardware which is adapted to bond the surface of the width of the web was greater than the width of the flange of the column or beam is joined to one surface of the web, than the width of the flange of the pillar or beam of said web A beam-to-column joint having a braced joint extending outward.

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