摘要
采用横观各向同性层状弹性体模型模拟半空间上部的层状场地，根据在ＳＨ波入射时这种场地土的动力刚度矩阵及基岩输入运动场地响应的计算公式，对夹有软弱土层的层状场地的响应进行了计算，计算结果表明，夹有软弱土层的层状场地与一般的层状场地的频谱特性有明显的区别，但并非总是减小场地的响应，在某些频率处其响应甚至要超过后者，这一点应引起注意。
A model of transversely isotropic elastic strata is used to simulate the soil layers situated on a half space. The dynamic stiffness matrix of the strata and the formula to evaluate their response to incident SH waves are derived. The response of strata with extremely soft soil layer is calculated. The results show that there are evident differences between the response Fourier spectra of strata with extremely soft soil layer and normal strata, and the former does not always decrease the reseponses of strata, at some frequencies the responses even exceed that of the latter. More attention should be paid to these phenomena.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
1999年第2期161-165,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
软弱夹层
频谱特性
响应
SH波
层状场地
transversely isotropic elastic strata, response Fourier spectra, strata with extremely soft soil layer
