JPH10131289A - Beam frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely transmit the bending moment of a beam to a girder and sufficiently exert the performance of the girder. SOLUTION: The end section of a beam 2 perpendicularly crossing a girder 1 is connected to it to form a frame. A fitting tool 3 having a hat-shaped longitudinal section is inserted between the girder 1 and the end section of the beam 2, the upper and lower fixing pieces 4 are fixed to the side face of the girder 1, and the end section of the beam 2 is connected to the connecting piece 5 of the fitting tool 3 facing the side face of the girder 1 at an interval. The fixing pieces 4 of the fitting tool 3 having the hat-shaped longitudinal section are fixed to the side face of the girder 1, the end section of the beam 2 is connected to the connecting piece 5 of the fixing tool 3 facing the side face of the girder 1 at the interval. The bending moment of the beam 2 can be surely transmitted to the girder 1, the performance of the girder 1 can be fully exerted, and a stable structure is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam frame.

[0002]

2. Description of the Related Art Conventionally, in a floor structure, a roof structure, or the like, there has been a structure shown in FIG. 6 as a beam frame for forming a frame by joining ends of small beams to large beams. That is, the H-beam girders 50
The plate 51 is welded and fixed to the web 50a between the upper and lower flanges 50b, 50b, and the ends of the plate 51 and the small beams 52 are fixed to the connecting plate 53 with bolts 54 to join them. In such a configuration, lateral buckling of the girder 50 can be prevented by the plate 51. When it is not necessary to prevent lateral buckling, as shown in FIG. 7, an angle 55 is attached to the web 50a of the large beam 50, and the small beam 52 is bolted to this.

[0003]

However, in the conventional example shown in FIG. 6, since the plate 51 is welded, it is necessary to design the large beam 50 after the position of the small beam 52 is determined in advance. For this reason, it was difficult to respond flexibly, and the cost was increased due to welding. In addition, the welding may cause distortion in the girder 50, and the girder 50 is not suitable for a thin, lightweight H-section steel.

In the conventional example shown in FIG. 7, since the angle 55 can be fixed by bolts, the above-mentioned problem does not occur.
In the case of lightweight H-section steel, prevention of lateral buckling of beams is an essential issue,
With such an angle 55, the bending moment of the small beam 52 could not be reliably transmitted to the large beam 50, and the performance of the large beam 50 could not be sufficiently exhibited. Another problem is that the angle 55 is twisted.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a beam frame capable of reliably transmitting the bending moment of a small beam to a large beam and sufficiently exhibiting the performance of the large beam.

[0006]

According to a first aspect of the present invention, there is provided a beam frame in which a beam is joined to an end of a small beam orthogonal to the beam, thereby forming a frame. The upper and lower fixing pieces are fixed to the side surface of the girder by interposing a hat-shaped fitting having a vertical cross section between the parts, and the joining piece of the fitting is opposed to the joining piece of the fitting opposite to the side face of the girder at intervals. It is characterized in that the ends are joined.

[0007] As described above, the fixing piece of the attachment having a hat-shaped longitudinal section is fixed to the side surface of the girder, and the end of the beam is joined to the joint piece of the attachment that opposes the side surface of the girder at intervals. Therefore, the bending moment of the small beam can be reliably propagated to the large beam, and the performance of the large beam can be sufficiently exhibited, so that a stable structure can be obtained. In addition, the position of the fixture can be flexibly adjusted as in the case of the conventional angle.

According to a second aspect of the present invention, in the first aspect, a continuous piece connecting the fixing piece and the joining piece of the fixture is inclined with respect to a horizontal plane. In this way, since the continuous piece of the fixture is inclined with respect to the horizontal plane, the structure is difficult to deform,
Further, a space for attaching the fixing tool is secured between the joint piece and the side surface of the girder, and the workability is improved. According to a third aspect of the present invention, in the first or second aspect, the height of the fixture is substantially equal to a distance between the upper and lower flanges of the girder,
A fixing piece is joined to a location near the flange of the girder. In this way, the height of the fixture is formed approximately equal to the distance between the flanges of the upper and lower girders, and the fixing piece is joined to a location near the flange of the girders. The effect of controlling the twisting in the longitudinal direction works most effectively.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A beam frame according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional side view showing a beam frame according to an embodiment of the present invention. In this embodiment, a beam frame in a floor structure is shown.
In addition, an end of the small beam 2 orthogonal to this is joined via a fixture 3 to form a frame.

The girder 1 is made of H-shaped steel, and has a bolt insertion hole near the flange 1b of the web 1a. Small beam 2
Also, the end plate 15 is fixed to the end part of the H-shaped steel. Further, two rows of bolt insertion holes are provided on both sides of the end plate 15 with the web 2a of the small beam 2 interposed therebetween. As shown in FIGS. 2 and 3, the attachment 3 is a hat-shaped steel material having a vertical cross section, and is provided with upper and lower fixing pieces 4 and 4 fixed to the side surface of the girder 1 and a space between the side surfaces of the girder 1. It has opposing joining pieces 5 and continuous pieces 6 and 6 connecting the fixing pieces 4 and 4 and the joining pieces 5. In this case, the height of the attachment 3 is substantially equal to the distance between the upper and lower flanges 1b, 1b of the girder 1. The fixing piece 4 has a bolt insertion hole 7 corresponding to the bolt insertion hole provided in the girder 1. The joining piece 5 is provided with a plurality of screw holes 8. In this case, four rows are provided, four in each row. The continuous piece 6 is 20 to 45 with respect to the horizontal plane.
(Bending angle θ = 45 to 70 ° in FIG. 4).

In the construction state, the bolt 10 is inserted through the bolt insertion hole 7 provided in the mounting fixture 3 and the beam 1 so that the nut 1
1 and the fixing piece 4 is fixed to the web 1a of the girder 1 as shown in FIG. Then, the bolt 12 is inserted into the bolt insertion hole provided in the end plate 15 of the small beam 2 and screwed into the screw hole 8 provided in the joint piece 5. At this time, the two rows of bolt holes 7 of the end plate 15 are aligned with the two rows of screw holes 8 of the four rows of screw holes 8 of the joining piece 5.
Usually, two rows of screw holes 8 in the center are used, but two rows of screw holes 8 on the right and left sides can be used depending on the position of the beam 2. In FIG. 1, the second screw hole 8 from the top and the lowest screw hole 8 among the four screw holes 8 formed in one row are used. Other screw holes 8 can be used depending on the size of the beam 2.

As shown in FIG. 4, when a load P is applied to the fixture 3, a bending moment M and an axial force N act. FIG. 5 is a graph showing the relationship between the axial force N, the bending moment M, the stress σ, and the bending angle θ. σ = M / Z + N / A
And the sectional modulus Z = 0.96 and the sectional area A = 9.6. It can be seen that the smaller the stress σ is, the more advantageous in conducting the member test, and the smaller the bending angle θ is, the smaller the stress σ is. Also, when the beam 3 is received by the fixture 3, the fixture 3 is provided with a bent continuous piece 6 to bear the axial force N on the fixture 3 and reduce the bending moment M. Enables weight reduction. In this case, the bending moment M is reduced by 20 to 30% by setting the bending angle θ to 30 to 65 °.

According to this embodiment, the fixing piece 4 of the attachment 3 having a hat-shaped longitudinal section is fixed to the web 1a of the girder 1, and the attachment 3 facing the web 1a of the girder 1 with a space therebetween. Since the end plate 15 of the small beam 2 is joined to the joining piece 5, the bending moment of the small beam 2 can be reliably transmitted to the large beam 1, and the performance of the large beam 1 can be sufficiently exhibited, so that a stable structure can be obtained. Further, since the fixing piece 4 is fixed to the fixing piece 4 by bolts, it is possible to flexibly correspond to the mounting position, and there is no possibility that the beam 1 may be distorted by welding.

Further, since the continuous piece 6 of the fixture 3 is inclined with respect to the horizontal plane, it is difficult to deform, and a space for mounting the bolt 12 is secured between the joint piece 5 and the web 1a of the girder 1. Workability is improved. further,
Since the height of the fixture 3 is formed to be substantially equal to the distance between the upper and lower flanges 1b, 1b of the girder 1 and the fixing piece 4 is joined to a location near the flange 1b of the girder 1, external force acts on the girder 2. In this case, the effect of controlling that the girder 1 is twisted in the longitudinal direction acts as effectively as possible.

The number of the screw holes 8 of the attachment 3 may be any number and number of rows, and may be other than the screw holes if it is fixed using a nut. Further, the small beam 2 may be a channel steel or the like.

[0016]

According to the beam frame of the present invention, the fixing piece of the attachment having a hat-shaped vertical section is fixed to the side surface of the girder, and the joining piece of the attachment which is opposed to the side surface of the girder with a space therebetween. Since the ends of the beams are joined, the bending moment of the small beams can be reliably propagated to the large beams, and the performance of the large beams can be sufficiently exhibited, so that a stable structure can be obtained. In addition, the position of the fixture can be flexibly adjusted as in the case of the conventional angle.

According to the second aspect of the present invention, since the continuous piece of the fixture is inclined with respect to the horizontal plane, it is difficult to deform, and a space for attaching the fixture is secured between the joint piece and the side surface of the girder. Workability is improved. According to the third aspect, the height of the fixture is formed substantially equal to the distance between the upper and lower flanges of the girder, and the fixing piece is joined to a location near the flange of the girder. The effect of controlling the torsion in the longitudinal direction works as effectively as possible.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a beam frame according to an embodiment of the present invention.

FIG. 2 is a front view of a fixture according to the embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is an explanatory diagram of a force acting on the fixture according to the embodiment of the present invention.

FIG. 5 is a graph showing a relationship between an axial force N, a bending moment M, a stress σ, and a bending angle θ in the embodiment of the present invention.

FIG. 6 is an exploded perspective view of a conventional example.

FIG. 7 is an exploded perspective view of another conventional example.

[Explanation of symbols]

 1 Large girder 1b Flange 2 Small girder 3 Fixture 4 Fixing piece 5 Joining piece 6 Continuous piece

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Soraoka 1-1-4 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd. (72) Inventor Koji Yamaguchi 1-chome Shinsenri-Nishimachi, Toyonaka-shi, Osaka No. 1-4 Inside National Housing Industry Co., Ltd.

Claims (3)

[Claims] 1. A beam frame comprising a beam and an end of a small beam orthogonal to the beam, which constitutes a frame. A hat-shaped mounting member having a vertical cross section is interposed between the beam and the end of the beam. The upper and lower fixing pieces are fixed to the side surfaces of the girders, and the ends of the small beams are joined to the joining pieces of the fixture that are opposed to the side surfaces of the girders at intervals. 2. The beam frame according to claim 1, wherein a continuous piece connecting the fixing piece and the joining piece of the fixture is inclined with respect to a horizontal plane. 3. The beam frame according to claim 1, wherein the height of the attachment is substantially equal to the distance between the upper and lower flanges of the girder, and the fixing piece is joined to a location near the flange of the girder.