摘要
分别构造厚度为25 m的砂性土场地和黏性土场地,对这2种场地各设置与GB 50111—2006《铁路工程抗震设计规范》中Ⅱ类、Ⅲ类、Ⅳ类场地相对应的3种剪切波波速水平,选取2条典型地震波作为出露输入地震波,将地震动峰值加速度缩放至设防烈度对应的地震动峰值加速度,分析各类场地的非线性响应。结果表明:低烈度地震作用下,场地的放大作用比较明显,砂性土场地的剪应变大于黏土场地,最大谱加速度受到地震输入波、剪切波波速和场地性质的影响。
The sand soil site and cohesive soil site with a thickness of 25 m were respectively constructed,three kinds of shear wave velocity levels corresponding toⅡ,Ⅲ,Ⅳkinds of sites of Code for Seismic Design of Railway Engineering(GB 50111-2006)were set for these two sites,2 typical seismic waves were selected as outgoing input seismic waves,the peak acceleration of earthquake motion was scaled to the peak acceleration value of earthquake motion corresponding to fortif ication intensity,and nonlinear response of various sites was analyzed.The results show that the amplif ication effect of low intensity earthquake is obvious,the shear strain of sand soil site is larger than that of cohesive soil site,and the maximum spectral acceleration is affected by seismic input wave,shear wave velocity and site properties.
作者
杨彦鑫
林大富
马建林
裴浩翔
YANG Yanxin;LIN Dafu;MA Jianlin;PEI Haoxiang(School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)
出处
《铁道建筑》
北大核心
2018年第8期147-150,共4页
Railway Engineering
基金
国家留学基金委(201407000019)
关键词
岩土地震工程
场地响应
非线性时域分析
场地条件
剪切波速
Geotechnical earthquake engineering
Site response
Nonlinear time domain analysis
Site condition
Shear wave velocity
