Fabricated self-balancing steel beam buckling restraining device

Abstract

The invention provides an assembly type self-balancing steel beam buckling restraining device. The assembly type self-balancing steel beam buckling restraining device comprises an aluminum pipe, an aluminum plate, two L-shaped plates, two first adjusting plates, two second adjusting plates, two third adjusting plates and a base. The aluminum plate is screwed on the base; the aluminum pipe is vertically fixed in the middle of the aluminum plate; the two test pieces are arranged on the two sides of the aluminum pipe in the horizontal direction, and each test piece comprises a web plate, an upper flange and a lower flange; the two L-shaped plates are connected to the two sides of the aluminum pipe in a screwed mode. The web plate of each test piece is screwed on the aluminum pipe through a second adjusting plate and a plurality of bolts; the upper flange of each test piece is in threaded connection with the L-shaped plate through a first adjusting plate and a plurality of bolts; and the lower flange of each test piece is screwed on the aluminum plate through a third adjusting plate and a plurality of bolts. The fabricated self-balancing steel beam buckling restraining device can be repeatedly used at steel beam test pieces with different section forms and sizes, local buckling at the concentrated load action position of the steel beam is effectively restrained, and meanwhile torsion caused by load eccentricity is avoided.

Description

technical field [0001] The invention relates to the field of auxiliary devices for bending tests of thin-walled steel beams, in particular to an assembled self-balancing steel beam buckling restraint device. Background technique [0002] In the bending test of thin-walled steel beams, there is a large local compressive stress at the concentrated load, which makes the steel beam specimens prone to local buckling and collapse phenomenon, so that the real steel beam cannot be obtained from the bending test. In addition, the section of the asymmetrical steel beam specimen is easily torsion under the action of concentrated load, resulting in the overall instability. [0003] The steel beam is a member that mainly bears the bending moment, so it is necessary for its scientific research and engineering application to carry out the bending test to obtain its mechanical properties under the action of the bending moment. However, since steel beams are generally thin-walled members, i...

AI Technical Summary

Problems solved by technology

To sum up, the existing technology has the following defects: poor confinement effect, such as the wood blocks in the filling wood block method have low rigidity due to material reasons, and it is difficult to provide sufficient rigidity and effective restraint for steel beams; Poor capacity, the restraint device can only be aimed at a specific section, and cannot adapt to the change of section form and size in different tests, such as the filled steel block method; the restraint device is difficult to reuse, and the restraint device usually needs to be replaced after a set of tests The device cannot be reused, and the economic benefit is not high

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