防灾减灾工程学报2017，Vol.37Issue(1)：33-38,6.DOI:10.13409/j.cnki.jdpme.2017.01.005
输入基底对深厚土层地震反应影响分析
Effect of Input Basement on Seismic Response of Deep Soil Deposit
摘要
Abstract
To the deep soil deposit,for which the shear velocity is less 500 m/s,while the burial depth is 100 m,the present methods dealing with the basement in seismic response computation are discussed.Based on theoretical analysis and engineering cases,3 basement models (linear ex trapolation,soft interlayer assumption and stiff basement) are made.The models' dynamic response under different seismic intensity is calculated by 1D equivalent linearization routines and the relative soil nonlinear parameters are provided by experiments.The PGA and response spectra are compared and the results show the stiff basement model is more favorable in engineering application,which is simple and compatible.The effect of wave velocity of stiff basement on seismic response is numerically analyzed and a proper wave velocity ratio between upper soil and basement is recommended.关键词
深厚土层/基底/地震反应/波速比Key words
deep soil deposit/basement/seismic response/wave velocity ratio分类
建筑与水利引用本文复制引用
彭小波,杨伟林,洪海春,瞿红梅..输入基底对深厚土层地震反应影响分析[J].防灾减灾工程学报,2017,37(1):33-38,6.基金项目
江苏省科技支撑项目(BE2014731)、国家自然科学基金项目(51208234)资助 （BE2014731）
