Anti-buckling devices at ends of thin-walled members for axial compression and bending tests

Abstract

The invention provides an anti-buckling device at the end of a thin-walled component in axial compression and bending tests, which comprises a combination of a base part welded on an end plate and a supporting part that is not welded. For a batch of processed thin-walled components, make a set of basic parts and then make supporting parts, and the specific size and quantity of the two parts are determined according to the test components. Weld the base piece to the end plate, keeping the centroid of the base piece coincident with the center of the end plate. During the test, the thin-walled components are directly inserted into the base part, or the matching parts are placed outside the base part first, and then the thin-walled components are placed after the size is satisfied. The device can adjust the cross-section through the mutual cooperation of the base part and the supporting part, so as to adapt to thin-walled components with different cross-sectional sizes. The device of the invention has simple structure, convenient manufacture, low cost, and can be reused, and can be widely used in structural axial compression or bending tests, and can effectively and completely prevent local buckling at the ends of thin-walled components.

Description

technical field [0001] The invention belongs to the technical field of structural engineering and mechanical equipment, and relates to an anti-buckling device at the end of a thin-walled component in axial compression and bending tests. The device can be applied to protect the ends of thin-walled components in structural axial compression or bending tests, and prevent test failures caused by partial buckling at the ends of the components before overall buckling. technical background [0002] At present, in structural axial compression or bending tests, the main method to protect the ends of thin-walled members is to weld an end plate at each end of the thin-walled member, and weld a certain number of Stiffeners. This method is mostly used for steel structural members, but it has the following disadvantages: (1) The welded end plates and stiffeners will be discarded together with the crushed members, which cannot be reused, which greatly wastes materials; Stiffeners cannot ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect of insufficient protection of the ends of thin-walled members under axial compression or bending in existing methods, the present invention provides an adjustable device for completely protecting the ends of thin-walled members in structural tests, that is, axial compression and compression of thin-walled members Anti-buckling device at the end of bending test, which can realize the repeated utilization of thin-walled round tubes or square tubes with different cross-sections

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