JPH11324134A - Building frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building frame structure capable of attaining unitization of rigidity balance of the building frame. SOLUTION: The upper end parts of braces 13 constituting a building frame 10 are connected to the underside of a beam 12 through a bracket 14. In this bracket 14, a joint plate 15 positioned in the vertical plane and fitting members 16, 16 fitting it to a beam 12 are integratedly formed by welding or the like. The joint plate 15 is joined with the upper end parts of the braces 13 by joining means such as bolts 17. The fitting members 16 are integrally provided so as to be positioned in the vertical plane of both side end parts of the joint plate 15, and the underside of the beam 12 is provided with fixed blocks 20, 20 positioned on both sides of the bracket 14. The upper end parts of the braces 13 are restrained displacement in the horizontal direction by both side fixed block 20, 20, and connected to the beam 12 capably of displacing in the vertical direction through oblong holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure suitable for reinforcing various structures such as buildings and factories.

[0002]

2. Description of the Related Art As is well known, a brace that extends obliquely is installed between two beams located above and below each other as a reinforcing member for a frame of various structures such as buildings and factories.

Conventionally, such a brace has an X-shape,
There are various types such as a C-shape, and in each case, the upper and lower ends of each brace are rigidly connected to the upper and lower beams or columns by means of bolts or welding.

[0004]

However, the conventional frame structure as described above has the following problems. In the case of the U-shaped braces 1 and 1 as shown in FIG. 4, the upper end thereof is attached to the beam 2, so that it is necessary to consider the vertical load from the floor or the like.

In general, the brace greatly influences the rigidity balance of the whole building. Therefore, a designer seeks an optimum cross section of the brace. However, a specific place such as a C-shaped brace 1, 1 as shown in FIG. When a large vertical load acts, the cross section of only the brace at that portion becomes large, and as a result, the rigidity balance of the whole building may be lost.
If the rigidity balance is not uniform as described above, it is conceivable that when an earthquake or the like occurs, stress concentrates on a portion having high rigidity or the like, and damage such as damage to the skeleton may occur.

The present invention has been made in view of the above points, and has as its object to provide a skeleton structure capable of achieving a uniform rigidity balance of the skeleton.

[0007]

According to the present invention, there is provided a skeleton structure of a structure, wherein a brace extending obliquely between two beams located above and below each other in the skeleton is provided. At least one of the upper end and the lower end is connected to the beam so that displacement is restricted in the horizontal direction and displaceable in the vertical direction.

Thus, at the connection between the brace and the beam, the beam is bent downward due to a vertical load such as a floor load, and the beam is in a balanced state. That is, the beam flexes greatly where the load is large, and the beam flexes small where the load is small, and the braces are connected in a balanced state to the vertical load in each beam. Also, when the vertical load acting on the beam changes, the beam flexes accordingly and is always in a balanced state. When a horizontal displacement occurs due to an earthquake or the like, the displacement of the brace with respect to the beam is restricted, so that the brace functions as a reinforcing material.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a frame structure according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a part of a frame of a structure such as a building or a factory. In this figure, reference numeral 10 is, for example, a steel frame, 11 is a column, 12 is a beam, and 13 is a C-shape. The brace.

As shown in this figure, a pair of two braces 13 are connected at their upper ends to the lower surface of the beam 12 via a bracket 14, for example.

As shown in FIGS. 1 and 2, the bracket 14 is provided with a joint plate 15 located in a vertical plane.
And attachment members 16 and 1 for attaching this to the beam 12.
6 are integrally formed by welding or the like. The upper end of the brace 13 is joined to the joint plate 15 by joining means such as a bolt 17. As shown in FIG. 2, the mounting member 16 is a joint plate 1
5 are integrally provided at both side end portions so as to be positioned in a vertical plane, and each has an elongated hole 18 having a predetermined length in the vertical direction.

On the other hand, as shown in FIG. 1, on the lower surface of the beam 12, there are fixed blocks 2 located on both sides of the bracket 14.
0 and 20 are provided. Each fixed block 20 is made of, for example, an H-shaped steel having a predetermined length with an axis positioned in the vertical direction, and is integrally attached to the lower surface of the beam 12 by welding or the like. These fixing blocks 20 are provided on both sides of the bracket 14 so as to face and contact the mounting members 16. Further, as shown in FIG. 2, each fixing block 20 has a mounting member 16 of the bracket 14 attached thereto.
A bolt hole 21 is formed at a predetermined position facing.
Reference numeral 12 a in the figure denotes a rib plate provided between upper and lower flanges of the beam 12 so as to be continuous with the flange of the fixed block 20.

The bracket 14 has bolt holes 21 and brackets 1 in fixing blocks 20 on both sides thereof.
4 are connected by a bolt / nut 22 inserted into the long hole 18. At this time, the distance between the upper end of the bracket 14 and the lower surface of the beam 12 is, for example, 20 m in the vertical direction.
A gap S of about m (set according to the amount of deflection of the beam 12) is formed.

Thus, the braces 13, 13
The fixed blocks 2 on both sides of the bracket 14
The displacement in the horizontal direction is restricted by 0 and 20. On the other hand, the bracket 14
The brace 13, 13 is connected to the fixed block 20 via the bracket 14 so as to be displaceable in the up-down direction because a long hole 18 having a predetermined length is formed in the up-down direction. .

In the structure of the frame 10, the brace 1
The upper end of 3 is connected to the beam 12 via a bracket 14 so that the displacement is restricted in the horizontal direction and can be displaced in the vertical direction. As a result, at the connection between the brace 13 and the beam 12, the beam 12
Can be deflected downward by a vertical load such as a floor load. For example, when the vertical load is large, the beam 12 is largely bent, and when the load is small, the beam 12 is slightly bent. In this way, the brace 13 is connected to each beam 12 in a state of being balanced with respect to the vertical load. No vertical load acts on the brace 13. Also, when the vertical load acting on the beam 12 changes, for example, when the load applied to the floor changes due to a renovation of the building or a change in use, the beam 12 bends accordingly and is always in a balanced state. . In this way, the overall rigidity balance of the frame 10 can be equalized, and damage to the frame 10 can be minimized even when an earthquake or the like occurs. Of course, the horizontal displacement of the brace 13 with respect to the beam 12 is restricted, so that when the horizontal displacement occurs due to an earthquake or the like, the brace 13 can effectively exhibit the function as a reinforcing material. In this way, it is possible to significantly increase the seismic resistance of the structure.

In the above-described embodiment, the bracket 14 is used for the connection between the brace 13 and the beam 12. However, the present invention is not limited to this. For example, the following structure may be used. As shown in FIG. 3, a joint plate 24 is integrally provided at the upper ends of the two braces 13, 13, and a long hole 25 having a predetermined length in the vertical direction is formed in the joint plate 24. On the other hand, a gusset plate 26 located in a plane parallel to the joint plate 24 is provided integrally on the lower surface of the beam 12. Then, the joint plate 24 on the brace 13 side
The brace 13 and the beam 12 are connected by fastening bolts and nuts 27 to a long hole 25 of the beam 12 and a bolt hole (not shown) formed in the gusset plate 26 on the side of the beam 12. With such a configuration, the brace 1
3 and the beam 12 are connected by a long hole 25 so as to be displaceable in the vertical direction, and are restrained in the horizontal direction.
Thereby, the same effects as those described in the above embodiment can be obtained.

Further, in the above embodiment, the brace 13 may be formed upside down. Also, the format is not limited to the C-shape, but may be another format.

The brace 13 as described above may be integrated into the new frame 10 when the frame 10 is newly installed, or may be additionally incorporated into the existing frame 10 later. In particular, when adding later, a frame may be separately provided inside the column and beam of the skeleton 10, and the brace 13 may be provided inside the frame as described above.

Other than this, any configuration may be adopted as long as it does not depart from the gist of the present invention, and it goes without saying that the above-mentioned configurations may be appropriately selectively combined. No.

[0021]

As described above, according to the skeleton structure of the present invention, at least one of the upper end and the lower end of the brace provided between the two beams positioned above and below each other is positioned with respect to the horizontal direction. In addition, it is connected to a beam so that its displacement is restricted and it can be displaced vertically. As a result, at the connection between the brace and the beam,
The beams deflect downward due to a vertical load such as a load on the floor, and the braces are connected to each of the beams in a state of being balanced with respect to the vertical load. Also, when the vertical load acting on the beam changes, the beam flexes accordingly and is always in a balanced state. Therefore,
The rigidity balance becomes uniform throughout the skeleton, and damage to the skeleton can be minimized even when an earthquake or the like occurs. Of course, when a horizontal displacement occurs due to an earthquake or the like,
Since the horizontal displacement of the brace with respect to the beam is constrained, the brace can serve as a reinforcing material. In this way, it is possible to significantly increase the seismic resistance of the structure.

[Brief description of the drawings]

FIG. 1 is an elevation view showing a part of a frame of a structure to which a frame structure according to the present invention is applied.

FIG. 2 is an elevational sectional view showing a main part of the skeleton.

FIG. 3 is an elevation view showing another example of the frame of the structure to which the frame structure according to the present invention is applied.

FIG. 4 is an elevation view showing an example of a conventional frame structure.

[Explanation of symbols]

 10 Frame 12 Beam 13 Brace

Claims (1)

[Claims] 1. A skeleton structure of a structure, wherein a brace extending obliquely is provided between two beams located vertically above and below each other in the skeleton, and at least one of an upper end portion and a lower end portion of the brace. The frame structure is characterized in that one of them is connected to the beam so that the displacement is restricted in a horizontal direction and the displacement is possible in a vertical direction.