Model box design method for simulating ground motion space differential effect and model box

Abstract

The invention relates to a model box design method for simulating a ground motion space differential effect and a model box. The design method comprises: designing the model box as an elastic beam system; simplifying a load acting on the model box as a simple harmonic traveling wave load; establishing a simplified calculation model and a load boundary condition of the model box; obtaining model box parameters for simulating the seismic space differential effect by utilizing integral transformation and a residue theorem; and designing the model box based on the model box parameters. Compared with the prior art, the method has the advantages of simplicity, convenience, reliability and the like, and can effectively realize the simulation of the ground motion differential effect in a multi-point vibration table test.

Description

technical field [0001] The invention relates to the technical field of structural dynamic response tests under the action of earthquakes, in particular to a method for designing a model box for simulating the spatial differential effect of earthquakes and the model box. Background technique [0002] With the development of geotechnical and underground engineering, more and more large-scale underground structures under complex conditions have emerged. When an earthquake occurs, due to the complex site conditions and large structure size, there will be an obvious time interval when the seismic wave reaches each point, resulting in a motion phase difference at each point. This phenomenon is called the spatial differential effect of earthquake motion. It will Significantly amplifies the seismic response of rock and soil masses and structures. The differential effect of ground motion has a non-negligible influence on the dynamic response of long tunnels and the free field analys...

AI Technical Summary

Problems solved by technology

Among them, the separate shear type box and the continuum model box are difficult to reasonably simulate the seismic spatial differential effect, and the segmental model box can simulate the phase change of traveling wave propagation to a certain extent, but the parameters of the model box are obtained by trial calculation. , more accurate parameters cannot be obtained, and the simulation accuracy of the differential effect of ground motion needs to be improved

Images