不同幅值作用下振动台斜坡动力响应模拟分析

Simulation analysis of dynamic response of shaking table slope under different amplitudes

依托实际斜坡,采用有限元软件对振动台斜坡模型进行动力数值模拟,斜坡周围设置为自由场边界,底部设置为固定边界。在斜坡模型水平向施加不同幅值的正弦波,得到斜坡的位移、速度和加速度值,并分析斜坡的动力响应特性。模拟结果表明,在竖直方向上,斜坡表面及内部的加速度响应都随斜坡高度的增加呈非线性增长的趋势,且响应的大小受幅值大小的影响。针对不同幅值作用下的斜坡的动力响应进行了分析,为该地区的工程建设提供一些抗震的参考和依据。

Based on the actual slope,the dynamic numerical simulation of the shaking table slope model was carried out by using finite element software.The free field boundary was set around the slope and the fixed boundary was set at the bottom.By applying sinusoidal waves with different amplitudes horizontally to the slope model,the displacement,velocity and acceleration values of the slope are obtained,and the dynamic response characteristics of the slope are analyzed.The simulation results show that the vertical acceleration response of the surface and interior of the slope increases nonlinearly with the increase of the slope height,and the magnitude of the response is affected by the magnitude of the amplitude.In this paper,the dynamic response of slope under different amplitude is analyzed,which can provide some reference and basis for the engineering construction in this area.