In-plane multidirectional loading fundamental frequency adjustable shake table model test shearing box

Abstract

The invention provides an in-plane multidirectional loading fundamental frequency adjustable shake table model test shearing box. The box comprises a base, box frames arranged on the base in a stackedmanner, slide connecting structures arranged between the adjacent box frames, rigidity adjustment devices connecting the box frames, wherein the rigidity adjustment devices are uniformly distributedin circumferential directions of the external surfaces of the box frames and comprise a plurality of rigidity adjustment units; the rigidity adjustment units are distributed in the same vertical direction; and each rigidity adjustment unit is connected with the adjacent quantity adjustable box frames. The in-plane multidirectional loading fundamental frequency adjustable shake table model test shearing box is simple in structure; the rigidity and fundamental frequency of the shearing box can be adjusted under the condition that structure safety is guaranteed; and a test result error can be reduced by optimizing a smaller boundary effect.

Description

technical field [0001] The invention relates to an in-plane multi-directional loading shear box with adjustable fundamental frequency for a model test of a shaking table, which belongs to the technical field of civil engineering. Background technique [0002] Shaking table model test is a very important test method in the process of studying the dynamic characteristics and seismic performance of building structures and underground structures under seismic loads. Compared with in-situ tests, it has advantages in terms of test cost and environmental requirements. [0003] In the real environment, the seismic load is transmitted from the local bedrock to the infinite soil mass, and its energy gradually attenuates along the propagation path in the plane, and basically no reflected waves are generated on the propagation path in the plane. In order to avoid the boundary effect of the test box For the error caused by the reflection of seismic load in the model test, the design of t...

AI Technical Summary

Problems solved by technology

However, it is still difficult to reduce the large experimental error while ensuring the structural rigidity, and it is not possible to achieve multi-directional loading

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