Seismic simulation shaking table test control method for cross-fault seismic waves

Abstract

The invention discloses a seismic simulation shaking table test control method for cross-fault seismic waves. A power part and a pseudo-static part of cross-fault seismic waves are separated through afiltering method, high-frequency acceleration is input into a system in order to obtain a high-frequency displacement driving signal, and a low-frequency pseudo-static displacement time history is superimposed on the basis, so that a wide-frequency displacement driving signal is obtained and is input into the shaking table control system, a shaking table is controlled, and shaking table test simulation of the cross-section seismic waves is completed. According to the methods, the requirements of the two aspects of the acceleration and the pseudo-static displacement of the cross-fault seismicwaves are both considered, and the seismic simulation shaking table for the cross-fault seismic waves can be accurately reproduced.

Description

technical field [0001] The invention relates to an earthquake simulation shaking table test control method, in particular to an earthquake simulation shaking table test method for a structure spanning an earthquake fault rupture zone, and belongs to the technical field of earthquake resistance tests of building structures. Background technique [0002] The difference between cross-fault ground motion and ordinary ground motion is mainly in two aspects: First, the ground motion difference on both sides of the fault is relatively large, that is, cross-fault ground motion is a kind of non-uniform excitation, and the non-uniform excitation excitation point The difference between them is different from non-uniform excitation in the traditional sense such as traveling wave effect and site effect, and there are large differences in the intensity, waveform and frequency spectrum of seismic waves. Second, the permanent displacement of the ground on both sides of the fault rupture zon...

AI Technical Summary

Problems solved by technology

However, the above methods cannot effectively realize the shaking table test simulation of seismic waves across faults.

If the method of directly inputting the time history of the acceleration is adopted, the simulation of the permanent displacement of the quasi-static ground will not be realized due to the working frequency of the shaking table; if the method of directly inputting the time history of the displacement is adopted, the simulated acceleration will have a large error, Often the accuracy requirements cannot be met

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