防灾减灾工程学报2017，Vol.37Issue(5)：712-717,6.DOI:10.13409/j.cnki.jdpme.2017.05.003
SH波入射下阶跃基岩覆盖土层场地地面运动特征分析
Characteristic Analysis of Ground Motions of Step Bedrock Site under SH Seismic Waves
摘要
Abstract
This article studies the impact of soil thickness and soil conditions on the peak ground acceleration and response spectrum of ground motion of step bedrock site by using two-dimensional seismic response analysis program of explicit finite element method.The distribution characteristics of ground motions are summarized.The SH wave is taken from recorded seismic waves of different frequency spectra.Research results are shown as follows:For the step bedrock field,the change of soil layer thickness has a more significant impact on the surface seismic response of the corresponding region and the surface seismic response of soil layer thickness constant region is not obvious.The soil conditions have an important impact on both PGA and response spectra.The peak acceleration of ground surface in soft soil and composite soil layer is greater than that of hard soil.The peak value of the response spectrum in soft soil site is greater than that of the response spectrum in the hard soil site,The peak response spectra period in hard soil is shorter,the peak response spectra period in soft soil is longer.The effect of soil properties on the response spectrum of ground motion is mainly reflected in the short period.关键词
地震波/阶跃基岩覆盖土层场地/土层厚度/土层性状/地震动Key words
seismic wave/step bedrock site/soil thickness/soil conditions/ground motions分类
天文与地球科学引用本文复制引用
王加锐,李鸿晶,孙广俊..SH波入射下阶跃基岩覆盖土层场地地面运动特征分析[J].防灾减灾工程学报,2017,37(5):712-717,6.基金项目
国家自然科学基金项目(51278245)、国家自然科学基金项目(51308293)资助 （51278245）
