摘要
针对均匀弹性半空间不同深度(20m,40m,80m)的细裂缝,由下向上分别垂直和斜(30°)入射一脉冲波,计算裂缝附近地面运动的时程反应和传递函数的幅值谱。计算结果与均匀半空间自由场做了对比,以说明竖向地裂缝对地震波传播和附近地面运动的影响。此外,对断裂周边一般结构抗震设计是否要考虑它的影响,提供了一点参考意见。
A homogeneous half space fault site including a small vertical crack is considered with three kinds of different depths （20m, 40m, 80m） respectively. A pulse wave travels along a homogeneous, isotropic and elastic half-space vertically and with an angle of incidence of 30°, respectively. The time history responses of seismic ground motion and the amplitude spectra of transfer function are computed near the vertical cracks. Compared with the seismic responses of free homogeneous half space, the results present the effect of vertical cracks on the propagation of seismic wave and the ground motion near the fault site. In addition the influence of the fault site on the surrounding structures is discussed to prove the regularity in seismic design and some significant suggestions are provided.
出处
《地震工程与工程振动》
CSCD
北大核心
2005年第5期34-40,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(50178065)
关键词
裂缝
斜入射
传递函数幅值谱
crack in fault site
inclined incidence
the amplitude spectrums of transfer function
