局部地形下入射波散射效应对场地地震响应的影响

Seismic response for local landform subjected to scattering of incident wave

局部地形下入射波散射效应对场地地震响应的影响是目前众多学者所关注的问题.其影响主要由入射波频率、入射角度、地形几何形状、介质性质等几个因素所制约,所反应出来的散射效应主要体现在地表位移变化上.本文归纳了凹陷地形、凸起地形、沉积谷地以及复合地形这四类局部地形入射波散射效应对场地地震响应的影响,对目前研究成果进行了评述,并针对数学技术、工程应用、模型建立等7个方面指出了现今存在的问题和今后发展的方向.

The seismic response for local landform subjected to scattering of incident wave has engaged researcher＇ s attention in recent years. This effect is conditioned by the frequency and angle of incident wave, landform geometry, medium property, etc. The scattering mainly reflects to surface displacement. To summarize, there are four main local landforms which are canyon, hill, alluvial valley and complex topography. This paper discusses the effect of scattering of incident wave by the four local landforms and gives a suggestion of future research.