A compression shear testing machine

Abstract

The invention relates to a press-shear testing machine. The press-shear testing machine comprises a mechanism frame provided with a vertical loading mechanism and a transverse loading mechanism, and further comprises a shear box comprising an upper box plate and / or a lower box plate and used for applying shear force on a corresponding rubber support base; a counter-force base stretching into the shear box is arranged on the mechanism frame; three shear hydraulic cylinders, which are uniformly arranged along the circumferential direction at intervals, are arranged between the counter-force baseand the inner wall of the shear box; one ends of the shear hydraulic cylinders are hinged with the counter-force base through a first hinged structure; and the other ends of the shear hydraulic cylinders are hinged with the inner wall of the shear box through a second hinged structure. The press-shear testing machine disclosed by the invention can realize a shear test in any direction of the rubber support base.

Description

technical field [0001] The invention relates to a compression-shear testing machine for performing multi-directional shear force tests on rubber bearings. Background technique [0002] Compression-shear testing machine is mainly used for testing the axial and radial compression, shear and rotational mechanical tests of rubber bearings under the compound conditions of compressive and shearing forces of various bridge plate and basin rubber bearings. Mechanical performance tests such as compressive elastic modulus, shear elastic modulus, allowable shear angle, friction coefficient and ultimate compressive strength of rubber bearings can be carried out. [0003] Existing hydraulic compression shear testing machines such as figure 1 As shown, the compression-shear testing machine includes a vertical loading mechanism and a horizontal loading mechanism, the vertical loading mechanism includes a vertical loading bracket, the vertical loading bracket includes a base, a column 5 an...

AI Technical Summary

Problems solved by technology

In this way, the shear resistance of the rubber bearing is tested. The problem with the existing hydraulic compression shear testing machine is that the loading trolley can only apply force to the rubber bearing because the loading trolley uses the vertical loading bracket as the reaction force frame. The force acting in one direction, that is to say, the shear plate can only exert a shear force in one direction on the rubber bearing, which is far from the bridge shear force on the rubber bearing in the real earthquake environment. In an earthquake environment, the bridge may sway back and forth in any direction, so the shear force on the rubber bearing is also a reciprocating action in multiple directions, while the compression-shear testing machine in the prior art can only realize one rubber bearing. The shear test of the deformation in the direction does not match the real force of the rubber bearing

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