计算力学学报2024，Vol.41Issue(6)：1029-1036,8.DOI:10.7511/jslx20230701002
考虑滑面应变软化效应的边坡震后位移计算方法
Seismic displacement calculation method of slope with considering strain-softening effect of slip surface
摘要
Abstract
The Newmark sliding block displacement method is used to calculate the seismic displacement of a slope,and the yield acceleration of a slope is considered to be a constant value,without considering the strain-softening effect of the slip surface and the influence of the real-time dynamic change of sliding slice geometric parameters during the seismic time history.For a homogeneous soil slope,based on the pseudo-static limit equilibrium theory,the calculated logarithmic spiral slip surface assumption,the strain-softening effect of the slip surface and the effect of real-time sliding angle on slice geometric parameters during the earthquake time history are considered,the formula for the dynamic yield acceleration and seismic displacement with considering the effect of strain-softening,and the calculation of slope seismic displacement is programmed.The results show that the slope dynamic yield acceleration firstly increases and then decreases as the steady growth of slope sliding angle.Considering the strain-softening effect,the calculated seismic displacement value of the slope is bigger than the calculated peak strength,but smaller than the calculated residual strength.With the decrease of the slope stability,the calculation results of the seismic displacement with and without strain softening effect both increuse,and the gap between them also increases.关键词
边坡/应变软化/Newmark滑块位移法/震后位移/实时动态Key words
slope/strain softening/Newmark sliding block displacement method/seismic displacement/real-time dynamic分类
交通工程引用本文复制引用
王家鑫,夏元友,王智德..考虑滑面应变软化效应的边坡震后位移计算方法[J].计算力学学报,2024,41(6):1029-1036,8.基金项目
国家自然科学基金面上项目(51374163)资助. （51374163）
