Progressive collapse resistance test device for arc-shaped beam column substructure

Abstract

The invention discloses a progressive collapse resistance test device for an arc-shaped beam column substructure, which comprises an arc-shaped beam column substructure test piece, and is characterized by further comprising a column head restraining device; the arc-shaped beam column substructure test piece comprises an arc-shaped beam and supporting columns located at the two ends of the arc-shaped beam, and a column head without a support at the lower end is arranged in the middle of the arc-shaped beam; the column head restraining device comprises a bottom plate and a limiting column arranged on the bottom plate, and a limiting groove in the height direction of the limiting column is formed in the limiting column; the column head of the arc beam column substructure test piece is located in the limiting groove and can slide up and down along the limiting groove. The device has the advantages that rotation and horizontal deformation of the column head in the test piece are restrained, only the vertical degree of freedom exists, and the collapse process of an arc-shaped beam structure can be truly simulated; the restraining device is in contact with the column head through the polyfluortetraethylene plate, so that the friction force is small, the vertical resistance provided by the device to the test piece is reduced, and the interference to the test result is avoided.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation of building structures, and relates to an anti-continuous collapse test device of an arc-shaped beam-column structure. Background technique [0002] Structural progressive collapse events caused by natural disasters and terrorist attacks often cause huge casualties and property losses, so the design of structural collapse resistance performance is very important. The structure has been reasonably designed to resist progressive collapse. When accidental loads cause local damage to the structure, the structure can redistribute the internal force through the backup load path to prevent further expansion of the damage, thereby reducing casualties and reducing the degree of structural damage as much as possible. However, the ability to resist the continuous collapse of the structure often needs to be clarified through experiments. [0003] In the prior art, some researchers have propo...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the problem existing in the existing technology is that the column head must be constrained to limit out-of-plane displacement and rotation, so as to conform to the real collapse of the arc-shaped frame structure state

Finally, there may be errors in the production of test pieces and devices, which will have a certain impact on the installation of various parts in the test system

Images