Integral stabilization test loading system of steel beam with lateral constriction under effect of single point loading

Abstract

The invention discloses an integral stabilization test loading system of a steel beam with lateral constriction under an action of single point loading, comprising a reaction frame consisting of a reaction column and a reaction beam, a lateral constriction device consisting of a vertical rolling device and a horizontal rolling device, a load applying device consisting of a jack and a loading frame, a load collection device and a horizontal rotation device. The invention can better simulate the steel beam constriction condition at the loading point in stabilization test of the steel beam having the lateral constriction, and enables the test result to be accurate. Particularly, the invention releases the bending constriction and vertical displacement constriction of the steel beam in the plane and outside the plane through the lateral constriction device limiting the lateral displacement and twisting of the test steel beam of the loading point, the vertical rolling of the vertical rolling bearing and horizontal rotation of the horizontal rotation device.

Description

technical field [0001] The invention relates to the technical field of steel structures, in particular to a loading device for the overall stable bearing capacity test of a steel beam with lateral restraint in the mid-span under single-point loading. Background technique [0002] Due to the high strength of steel, the cross-section of steel structural members is often made smaller, and the steel plates used are also thinner, which leads to the bearing capacity of steel structural members is often controlled by the overall stability, and steel beams are no exception. The research on the overall stable bearing capacity of steel beams is one of the most dynamic directions at present. [0003] For such as figure 1 The simply supported beam with a lateral constraint in the middle of the span shown and bearing the concentrated load, the deformation after the overall instability is as follows figure 1 shown by the dotted line in . It can be seen from the deformation diagram that...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the traditional loading method leads to inaccurate test results in the test and research of the overall stable bearing capacity of the steel beam with lateral restraint under the action of single point loading

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