Device for testing pure bending performance of beam

Abstract

The invention relates to a structure testing device, in particular to a device for testing pure bending performance of a beam. The device comprises a loading beam and lateral limiting brackets, wherein the loading beam is arranged in the middle of the upper surface of a test beam; the lateral limiting brackets are arranged on two sides of the test beam and two sides of the loading beam; the loading beam comprises I-steel, round steel and a stiffening plate; each lateral limiting bracket comprises a vertically arranged lateral support, a horizontally arranged bottom plate, a diagonal bracing, connecting bolts, spring washers I, flat washers, rubber pads, plastic pads, countersunk bolts, spring washers II and nuts, one end of the diagonal bracing is connected onto the bottom plate, the other end of the diagonal bracing is connected onto the lateral support, the connecting bolts, the spring washers I and the flat washers are used for fixing the bottom plate, the rubber pads and the plastic pads cover one side surface of the lateral support, and the countersunk bolts, the spring washers II and the nuts are used for fixing the rubber pads and the plastic pads. The device is convenient to mount, and pure bending moment load is vertically applied; the positions of the lateral limiting brackets are easy to adjust, so that the device adapts to the test beams with different widths; and the effect of limiting lateral deformation and twisting of the test beam is good during testing.

Description

technical field [0001] The invention relates to a structure test device, especially a pure bending performance test device of a beam. Background technique [0002] Structural test device refers to the equipment, instruments and components involved in the structural test. When studying the pure bending performance of a beam, it is necessary to ensure that the middle part of the beam is only subjected to the action of the bending moment. Therefore, it is necessary to use a load distribution beam to divide the load into two forces along the length of the beam and apply it to the middle part of the beam symmetrically. However, due to the inevitable errors in processing and testing, the load is not applied vertically; or the test beam itself is somewhat twisted, so that lateral torsion occurs at the initial stage of loading. In order to reduce the impact of these errors on the test, it is necessary to use some test devices to limit the load distribution beam and the test beam la...

AI Technical Summary

Problems solved by technology

At present, this kind of test device mostly uses steel brackets. Due to insufficient surface finish of the brackets or inappropriate tightness of the lateral restraints, it often occurs that the lateral restraints cannot be restrained or too many restraints share part of the vertical load, which affects the test. accuracy, sometimes even pure bending tests are not possible

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