Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Surface motion of an alluvial valley in layered half-space for incident plane SH waves

LIANG Jianwen,Ba Zhenning(Tianjin University,Tianjin 300072,China)  
Wolf's theory is extended to solve the problem of wave scattering by an alluvial valley.The indirect boundary element method(IBEM) is used to calculate the amplification of incident plane SH waves by an alluvial valley in layered half-space.The free-field response is carried out to give the displacements and the stresses on the line which forms the boundary of the valley.The fictitious uniform loads are applied on the same line to calculate the Green's functions for the displacements and the stresses.The amplitudes of the loads are determined by the boundary conditions of continuity of the displacements and the stresses.The displacements due to the free field and from the fictitious uniform loads have to be added to obtain the whole motion.Taking the amplification of incident plane SH waves by an alluvial valley in one layer over half-space as an example,the numerical results and analyses are performed.The results show that there exist distinct differences between the wave amplification by an alluvial valley in layered half-space and that in homogeneous half-space.The reasons for the difference are explained,and the effects of the thickness and the stiffness of the layer on the amplification are discussed.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved