A Space-Loaded Bearing for Unsymmetrical Cross-Section Bias Tests

Abstract

The invention relates to a spatial loading support for asymmetrical section bias test. The spatial loading support includes a pin hinge component, a horizontal movement device and a vertical movement device. The pin hinge component is composed of a lug plate a and a lug plate b which are in rotatable connection, wherein the lug plate a is provided with an upper roof plate and a side plate. The vertical movement device is located on the upper roof plate. The horizontal movement device is in abutting connection with the side plate through a horizontal connecting rod. The horizontal movement device and the vertical movement device apply a horizontal load and a vertical load on a test piece through the pin hinge component. The spatial loading support further comprises a conversion device and a spherical hinge, wherein the spherical hinge is arranged on the upper roof plate of the lug plate a, and the conversion device is arranged on the spherical hinge; the vertical movement device is arranged on the conversion device; the center of the vertical movement device can be overlapped with the centroid of the lug plate a through the conversion device and the spherical hinge, and at the same time, the centroid of the lug plate a is overlapped with the centroid of the test piece; and therefore, the vertical load can act along the centroid of the test piece constantly. Compared with the prior art, the spatial loading support of the invention has the advantages of simple structure, accurate testing and the like.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure tests, and in particular relates to a novel space-loaded support for asymmetric cross-section bias tests. Background technique [0002] In the compression-bending test of frame columns or the quasi-static test of joints, it is usually necessary to apply vertical and horizontal loads at the top of the column at the same time to consider the influence of the axial compression ratio or P-Δ effect on the bearing performance of columns or the seismic performance of joints. For columns whose section centroid and shear center coincide, the current pin-hinge device can meet the loading requirements. When the column is L-shaped or groove-shaped and other special-shaped sections, its centroid and shear center often do not coincide, and usually the vertical and horizontal actuators of the testing machine can only work in one plane. Currently, the frame for this type of section In column ...

AI Technical Summary

Problems solved by technology

When the column is L-shaped or groove-shaped and other special-shaped sections, its centroid and shear center often do not coincide, and usually the vertical and horizontal actuators of the testing machine can only work in one plane. Currently, the frame for this type of section In column compression bending test or joint quasi-static test, both horizontal load and vertical load are usually applied to the centroid of the section, which causes additional torque on the column, which is inconsistent with the actual stress state and increases the difficulty of analysis

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