Shearing box

Abstract

The invention provides a shearing box, comprising at least two bases arranged on different vibrating tables, and laminated box bodies which are placed on the bases and are formed by overlapping framesprovided with openings at the side edges; every two adjacent bases are connected with each other by means of a bearing plate, one end of the bearing plate is fixed, and the other end of the bearing plate is movable; every two adjacent frames, which are positioned on the different laminated box bodies and are arranged on the same horizontal plane, are connected with each other by means of a universal coupling; openings of the adjacent laminated box bodies are connected with each other by means of a baffle plate so as to form a communicated container; all the laminated box bodies are respectively provided with limiting components, so that the soil in the shearing box can be subjected to different excitation; furthermore, the seismic ground motions of the bases are relatively independent, but can be mutually propagated; the laminated box bodies are communicated with one another, and the soil can be placed at the communicating parts; the vibration is propagated through the soil medium, sothat the constitutive property that the frame structure of the shearing box is perpendicular to the vibration direction is met; furthermore, the structure can rotate along multiple directions, the real situation of the interaction between the soil and the underground structure under multi-point excitation is simulated, the experiment is accurate.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a shear box. Background technique [0002] Shaking table test is an important method to verify the earthquake damage process of structures. It not only completely reproduces the earthquake process, but also analyzes the structure-soil interaction mechanism under various earthquake motions. For the shaking table test of the underground structure, the structural model needs to be placed in the model box to realize the interaction between the underground structure and the soil, and to study the dynamic response effect of the earthquake under complex working conditions. [0003] Due to the structure of the shaking table, there is a certain distance between the two tables of the shaking table. When conducting the shaking table test of the underground structure with non-uniform excitation, most of them use two independent shear boxes, and the middle tunnel (pipe) directly cro...

AI Technical Summary

Problems solved by technology

In the past, the main problems with the multi-point excitation shaking table shear box are: the vibration table excitation is carried out under two relatively independent shaking table test conditions, and the ground motion will not be transmitted to another model box structure through the soil medium. Inside, the transmission between the boxes is mainly transmitted directly by the tunnel pipe joints, and the effect of the direct transmission process is not considered in the interior of the soil; at the same time, under the condition of non-uniform excitation, the structural response is easier for the connecting tunnel part without soil wrapping Amplifies, and the effect is very obvious

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