现代地质Issue(6)：1252-1259,8.
北京延庆新城规划区场地动力响应数值模拟
Numerical Simulation Study on the Site Speed Response of Yanqing New City Planning Region in Beijing
摘要
Abstract
In the earthquake prone inland environment of China,the evaluation of site stability has drawn more and more attention.For the study of large site dynamic response characteristics of Yanqing new city planning region,this paper firstly found out the Quaternary overburden layer and the spatial distribution of fractures in Yanqing new city planning region;secondly,it established a 3D simulation model for planning region using FLAC3D based on numerical simulation;thirdly,it made a simulation of the site dynamic response in planning region;and lastly,it described the characteristics of site dynamic response by defining the coefficient of site speed response.The results reveal the following aspects:in the typical sites of soil-rock composite,different thicknesses of the Quaternary overburden layer could lead to different levels of site speed response under the low-frequency shear-wave excitation,and while the Quaternary overburden layer gets thicker,the coefficient of site speed response gets greater and the degree of dynamic amplification gets higher;in the complex site of un-derlying fracture,the shear wave propagation path becomes very complicated,and the fracture has an amplifi-cation effect to the coefficient of surface speed response,while the amplification level is related with the distri-bution form and development scale of fractures.关键词
第四纪覆盖层/下伏断裂带/低频剪切波/场地速度响应系数/数值模拟Key words
Quaternary overburden layer/underlying fracture zone/low shear wave/coefficient of site speed response/numerical simulation分类
天文与地球科学引用本文复制引用
冯军,张彬,黄骁,孙进忠,柏永亮,霍东平..北京延庆新城规划区场地动力响应数值模拟[J].现代地质,2014,(6):1252-1259,8.基金项目
国家自然科学基金项目（40902086，61427802）；中央高校基本科研业务经费项目（2009ZY14）。 （）
