土质边坡地震加速度放大效应数值模拟研究  

Numerical Simulation Study on Seismic Acceleration Amplification Effect of Soil Slopes

作　　者：叶镜 李琼林 富海鹰[1] YE Jing;LI Qionglin;FU Haiying(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《内蒙古大学学报（自然科学版）》2024年第3期317-328,共12页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金项目(52278372)。

摘　　要：为探究地震作用下边坡沿高程方向的峰值加速度(PGA)放大效应规律,采用OpenSees有限元软件对均质土坡在不同地震动下的PGA放大效应进行数值模拟计算,研究了土层剪切波速(V_(s))、坡角(θ)和坡高(H)等因素对PGA放大系数的影响规律。通过Logistic函数曲线对各PGA平均放大曲线进行拟合并对拟合形态参数进行分析,最终构建了基于剪切波速、坡角和坡高的三因素η计算公式,并对该公式进行了验证。To investigate the amplification effects of peak ground acceleration(PGA)along the elevation direction of slopes under seismic loading,the finite element software OpenSees was employed to conduct numerical simulations on the PGA amplification effects of homogeneous soil slopes subjected to various seismic motions.The effects and correlation of factors such as shear wave velocity(V_(s)),slope angle(θ),and slope height(H)on PGA amplification coefficient were studied.In this study,each average PGA amplification curve was fitted with a Logistic function curve,and the fitted shape parameters were analyzed.Ultimately,a three-factor n calculation formula was constructed based on shear wave velocity,slope angle,and slope height.In addition,the validity of formula was verified.

关 键 词：地震峰值加速度 有限元 放大效应 Logistic曲线拟合 三因素计算公式 

分 类 号：TU435[建筑科学—岩土工程] P315[建筑科学—土工工程]