Load Bearing Frame

Abstract

The present invention is to provide a load bearing frame for suppressing generation of buckling of diagonal materials and breakage of connection parts and having high deformability.A load bearing frame 1 has two pillar materials 2 and 3, two frame materials 4 and 5 and four diagonal materials 6 to 9. A connection point 41 between the pillar material 3 and the frame material 4 is apart from a connection point 43 between the diagonal material 6 arranged on the uppermost side and the pillar material 3 by a distance L1. A connection point 48 between the pillar material 3 and the frame material 5 is apart from a connection point 47 between the diagonal material 9 arranged on the lowermost side and the pillar material 3 by a distance L2.

Description

TECHNICAL FIELD[0001]The present invention relates to a load bearing frame used for forming a wall surface of a building.BACKGROUND ART[0002]A general load bearing frame is formed in a truss structure of a substantially rectangular shape in which both ends of two pillar materials are respectively connected by two frame materials, and the two pillar materials are diagonally connected by a plurality of diagonal materials (refer to Patent Documents 1 and 2 for example). Here, in the conventional load bearing frame, connection points between diagonal materials arranged on the uppermost side and the lowermost side and pillar materials correspond to corner parts of a frame. In the load bearing frame of the above structure, force is smoothly transmitted, while in the case where an excessive horizontal load is imposed, there is a problem that a stress is concentrated on the diagonal materials and connection parts so that buckling of the diagonal materials and breakage of the connection part...

AI Technical Summary

Benefits of technology

[0004]A major object of the present invention is to provide a load bearing frame for suppressing generation of buckling of diagonal materials and breakage of connection parts and having high deformability.Means for Solving the Problems

[0007]According to the above configuration, even in the case where a horizontal load (a load in the perpendicular direction to the pillar material) is imposed on the load bearing frame, the horizontal load is not directly transmitted to the diagonal materials but indirectly transmitted through the pillar materials between corner parts of a frame and the diagonal materials. Therefore, generation of an excessive stress in the diagonal materials and connection parts is suppressed. In comparison with the conventional frame in which the connection points between the diagonal materials and the pillar materials correspond to the corner parts of the frame, since rigidity of the frame is reduced so as to facilitate deformation, it is possible to prevent sudden collapse after a maximum load is obtained. Therefore, in the present invention, buckling of the diagonal material and breakage of the connection parts in an earlier stage are suppressed, and an energy absorption capacity excellent in deformability over the entire frame is obtained.

[0009]According to the above configuration, it is possible to suppress the generation of the buckling of the diagonal materials and the breakage of the connection parts in the earlier stage, and also to prevent a large decrease in a load bearing capacity of the entire frame.

[0011]According to the above configuration, even in the case where length of the diagonal materials is longer than height of the frame (height of a rectangular frame) (in the case where a ratio between width and the height of the frame is large), it is possible to improve buckling strength of the diagonal materials. Therefore, it is possible to improve the load bearing capacity of the entire frame.

[0013]According to the above configuration, even in the case where force in the direction of leaving apart from the pillar materials is imposed on the diagonal materials, energy is absorbed by plastic deformation of the connection members. Therefore, the load bearing capacity of the entire frame is improved.

Problems solved by technology

In the load bearing frame of the above structure, force is smoothly transmitted, while in the case where an excessive horizontal load is imposed, there is a problem that a stress is concentrated on the diagonal materials and connection parts so that buckling of the diagonal materials and breakage of the connection parts are generated in an earlier stage and thus deformability of the entire frame is small.

Therefore, there is sometimes a case where after a maximum load is obtained, the entire frame suddenly collapses.

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