重庆大学学报Issue(9)：68-76,9.DOI:10.11835/j.issn.1000-582X.2014.09.009
场地条件对西昌昔格达组三维地基地震动响应
Seismic response of site conditions to Xigeda formation of Xichang three-dimensional subgrade
摘要
Abstract
In order to find out the effect of site structure and distribution of cut-fill area on the seismic responses rules of Xigeda formation three-dimensional subgrade in Xichang,finite element method software is used to simulate the acceleration distribution on the surface of three-dimensional calculation models under seismic load.This paper discusses differences of subgrade seismic response from three aspects,including platform structure of the site,elevation mutation,and excavation and filling area.And there are four conclusions can be drawn.Firstly,the higher the elevation sites platform is,the greater the acceleration amplification factors are,especially in the changes of vertical acceleration amplification factors.Secondly,a sudden increase of elevation causes a sudden increase of vertical acceleration magnification factors,and acceleration amplification factors is getting smaller while extending to the platform inside.Thirdly,the acceleration amplification factors of filled area are greater than those of the excavation area.Fourthly, because terrain amplification of the seismic response is directional,three-dimensional calculation models should be used to numerical analysis.The results provide an important basis for the Xigeda subgrade base plan selection in Xichang and seismic design.关键词
昔格达组/三维地基/场地条件/加速度放大系数Key words
Xigeda formation/three-dimensional subgrade/site condition/acceleration amplification factors分类
建筑与水利引用本文复制引用
陈积普,徐则民,张家明,刘文连..场地条件对西昌昔格达组三维地基地震动响应[J].重庆大学学报,2014,(9):68-76,9.基金项目
国家自然科学基金项目-云南联合基金重点项目（U1033601）；高等学校博士学科点专项科研基金项目 （）
