A Three-way Motion Decoupled Periodic Structure for Shaker Model Box

Abstract

The present invention provides a three-way motion decoupling periodic structure used in a shaking table model box. The periodic structure is formed by stacking n periodic structural units sequentially. The coupling layer, the second confinement layer, and the elastic layer are stacked in sequence, and n≥2 is a positive integer, and the cross-sectional shapes of the first confinement layer, the elastic layer, the second confinement layer, and the plane decoupling layer are the same, The periodic structure is used to realize the decoupling of the three-way motion under the working condition of the earthquake; the present invention also provides a three-way motion decoupling model box for the shaking table test, which is composed of the periodic structure, the bottom plate of the model box, and the limit protection door type. The model box is light in weight and high in strength, and is suitable for supergravity and normal gravity shaking table tests, and multiple measures are taken to ensure the synchronization of the movement of the model box and the test soil, and the movement of the model box and the test soil in X, Y The movements in the three directions of , and Z do not interfere with each other, the model box does not generate additional force on the test soil, and the boundary effect is avoided as much as possible. It can well realize the decoupling of the three-way movement and restore the characteristics of the prototype site.

Description

technical field [0001] The present invention relates to the field of civil engineering, in particular to a three-way motion decoupling periodic structure for a shaking table model box, including the three-way motion decoupling shaking table model box of the periodic structure and its application, the vibration The invention relates to a three-way motion decoupling model box of a table, in particular to a three-way motion decoupling model box suitable for a vibrating table of an ultragravity centrifuge. Background technique [0002] In the field of civil engineering, people usually use observation and prediction methods to understand the behavior of civil engineering objects, judge its service performance and safety, and make corresponding countermeasures. Observation is mainly prototype observation, which directly obtains the information of the working properties of the engineering structure by embedding measuring elements in the completed engineering structure. This kind of...

AI Technical Summary

Problems solved by technology

Drawbacks are: more attention paid to area than depth; surface stresses are not correct; waves are emitted from boundaries; earthquakes near the site are not modeled well

In summary, the above techniques can only be used in one-way shaking table tests, and cannot be used in two-way shaking table tests or three-way shaking table tests

[0018] The patent CN103940977A eliminates the influence of the side wall effect by applying prestress, and the specific implementation is realized by adjusting the prestress value of the steel cable, but the method has the following problems: the applied prestress will affect the model box The horizontal stiffness has an impact, that is, after the prestress is applied vertically, it is difficult to deform horizontally with the deformation of the soil, which shows that the horizontal direction becomes harder; the result of applying prestress is to make the vertical stiffness of the model box and the soil In practice, the vertical stiffness of the soil varies, so this method has a large error in simulating the boundary; the technique of applying prestress is relatively cumbersome, and the accuracy is difficult to control

However, existing technologies are not yet able to

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