圆弧状多层沉积凹陷在平面SV波入射下的动力响应  

Dynamic responses of canyon with multiple arc-shaped layers under incidence of plane SV waves

作　　者：陈三红[1] 张郁山 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震灾害防御中心,北京100029

出　　处：《岩土工程学报》2017年第6期1074-1081,共8页Chinese Journal of Geotechnical Engineering

基　　金：地震行业科研专项项目(201408020);国家科技支撑项目(2012BAK15B01)

摘　　要：利用波函数的Fourier-Bessel级数展开法,推导了含任意多个圆弧状沉积层的凹陷地形在平面SV波入射下动力响应的解析解。通过与单一沉积凹陷条件下所得结果的比较,验证了该解析解计算结果的正确性。利用该解析解,研究了凹陷地形上覆沉积介质的成层性,包括沉积层的层数、排列顺序、以及软弱夹层的厚度和刚度等,对地面运动的影响效应。By using the Fourier-Bessel series expansion of wave function, obtained is the analytical solution to the dynamic responses of canyon with multiple arc-shaped alluvial layers under the incidence of plane SV waves. Comparison of the results of single-layered canyon validates the rightness of the proposed analytical solution. From this analytical solution, the layering effects, such as the number of layers, their sequence and the stiffness and thickness of soft interlayers, of the overlying alluvia on the ground motion are studied.

关 键 词：地震波 散射 解析解 凹陷地形 地震动 

分 类 号：P315-3[天文地球—地震学]