Rayleigh波入射情形下的断层效应  

Effect of fault on ground motion in the case of incident Rayleigh wave

作　　者：周正华[1] 温瑞智[1] 毛国滨[1] 王玉石[1] 王宇欢[1] 杨程[1] 

机构地区：[1]中国地震局工程力学研究所

出　　处：《地震工程与工程振动》2006年第5期1-6,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50178065);973项目(2002CB412706);国家社会公益研究专项(2002DIB30076);地震科学联合基金项目(105023)

摘　　要：本文运用数值模拟方法对Rayle igh波入射情形下的断层效应进行分析,结果表明:断层对Ray-le igh面波具有隔震作用,随断层深度的增加其隔震效果更加明显,且水平向的隔震效果强于竖向。在入射波一侧,由于断层的作用使接触带附近的反应增强,随着断层破碎带宽度的增加,竖向反应变化特征明显不同于水平向反应变化特征。In this paper, the effect of a fault on the ground motion in the case of incident Rayleigh wave is analyzed by using the numerical stimulation method. The result shows that the fault can make the intensity of Rayleigh wave rapidly attenuate. The larger the depth of fault is, the more obvious the fault effect will be. The effect of fault on the horizontal component is larger than that on the vertical component. On the side of incident wave, the fault effect strengthens the earthquake responses in the vicinity of the fault interface. The effect of fault width on the vertical response is different from the effect on the horizontal response.

关 键 词：RAYLEIGH波 数值模拟 断层 

分 类 号：P315.915[天文地球—地震学]