摘要
以江苏典型地层分布和某工程场地为原型,结合地层参数,针对软土夹层在埋深不变的情况下,计算厚度分别为3m、5m和9 m的3个剖面来分析软土夹层的埋深和厚度对地表地震动参数的影响,文中选用El Centro时程曲线进行场地地震反应分析。结果表明:软土夹层厚度对地震动的加速度峰值Amax、特征周期Tg的影响较为明显;地震动加速度峰值随着软土夹层厚度的增加而减小,速度峰值随其增加而减小,位移峰值随其增加而增加;反应谱峰值随其增加而减小,反应谱峰值所对应的周期随着厚度的增加而增加;特征周期随软土夹层厚度的增加而增加。
The ground seismic response characteristics of some engineering district of typical stratigraphic distribution in Jiangsu are analyzed by soft interlayer thickness of 3m,5m and 9m in the same buried depth,El Centro time history curve is chosen to do the seismic response analysis. The results show that： the effect of soft clay interlayer thickness on the ground acceleration peak and characteristic period is obvious; the ground acceleration peak,speed peak and response spectrum maximum decrease with the increasing of the soft clay interlayer thickness; the characteristic period and displacement maximum increase with the growing of the soft clay interlayer thickness.
作者
李美娟
夏雄
Li Mei-juan X ia Xiong(School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China Institute of Geotechnieal Engineering, Changzhou University, Changzhou 213164, China)
出处
《工程抗震与加固改造》
北大核心
2017年第5期149-153,共5页
Earthquake Resistant Engineering and Retrofitting
基金
政策引导类计划(产学研合作)-前瞻性联合研究项目(BY2015027-03
BY2015027-15)
常州市科技局城市建设影响下地面沉降灾害评估与防灾技术研究基金(CE20135038)
关键词
地震反应
软土夹层
覆盖层
时程曲线
seismic response
soft clay interlayer thickness
cover
time history curve
