【摘要】 本文采用二维显式有限元结合透射边界的数值方法,考虑均匀弹性半空间内存在着不同宽度及深度的断层,由下向上分别垂直和斜(30°)入射一个脉冲波,研究非发震断层地面运动的一些特点。通过计算断层内外地震地面运动传递函数的幅值谱,并与自由场反应对比,以说明竖向断层对地震波传播和附近地面运动的影响,在此基础上进一步对断层周边一般结构抗震设计是否要考虑断层影响提出了几点建议。更多还原

【Abstract】 In order to study the effect of faults on the ground motion,the homogeneous half space,in which there is a fault with different width and depth,is analyzed when it is subjected to a vertical or inclined upward pulse wave input.2D explicit finite element schemes and multi-transmitting boundary condition methods are employed in the present analysis.To show the effect of faults on the propagation of seismic wave and the ground motion near the fault sites,the seismic responses and amplitude spectra of transfer function inside and outside the faults are computed and compared with those in the free half space.Based on the computed results,some suggestions are made for the seismic design of structures around the faults.更多还原