Numerical study of slope stability considering vertical seismic action
LIU Ziyuan
ZHAO Shaofei
LI Pingping
WANG Hang
BAO Junwen
Abstract：Although seismic action is an important factor that causes slope instability and failure,whether verti-cal seismic action has an effect on slope stability is still controversial.In order to solve this problem,the slope numerical calculation model is established by FLAC3D finite difference method,and the Wenchuan seismic wave measured at Wolongtai is selected for numerical analysis.The displacement time history of three monito-ring points of slope top,slope waist and slope foot is used to reflect the influence of vertical seismic action on slope stability.The calculated results show that the permanent displacement increase rate of slope under verti-cal seismic action is 9.8%～13.5%,which exceeds the 10%growth rate of pseudo-static method and newmark slider model.The vertical seismic action is more important in the analysis of the permanent displacement of the slope.Compared with horizontal earthquake alone,when horizontal earthquake and vertical earthquake act to-gether,the slope permanent displacement time history response is almost the same,but the slope vertical dis-placement response is significantly different.
Keywords：slope engineeringfinite difference methodvertical accelerationpermanent displacement
Publication Date：2024-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 57-64 )