考虑竖向地震作用的边坡稳定性数值研究  

Numerical study of slope stability considering vertical seismic action

作　　者：刘子源 赵少飞 李萍萍 王航 鲍俊文 LIU Ziyuan;ZHAO Shaofei;LI Pingping;WANG Hang;BAO Junwen(School of Mine Safety,North China Institute of Science and Technology,Yanjiao 065201,China;Hebei Key Laboratory of Civil Engineering Disaster Control and Disaster Emergency,Yanjiao 065201,China;Security Department,North China Institute of Science and Technology,Yanjiao 065201,China)

机构地区：[1]华北科技学院矿山安全学院,北京东燕郊065201 [2]河北省土木工程灾变控制与灾害应急重点实验室,北京东燕郊065201 [3]华北科技学院保卫处,北京东燕郊065201

出　　处：《华北科技学院学报》2024年第6期57-64,共8页Journal of North China Institute of Science and Technology

摘　　要：尽管地震作用是造成边坡失稳破坏的重大影响因素,但对于竖向地震作用是否对边坡稳定性产生影响仍然存在争议。为了解决这一问题,本文运用FLAC3D有限差分法建立边坡数值计算模型,选取卧龙台实测汶川地震波进行数值分析,通过边坡坡顶、坡腰和坡脚三个监测点的位移时程反映竖向地震作用对边坡稳定性的影响。计算结果表明,竖向地震作用下,边坡永久位移增加率为9.8%~13.5%,超过拟静力法和Newmark滑块模型10%的增长率,竖向地震作用在边坡永久位移分析中较重要。与水平地震单独作用比较,当水平地震与竖向地震共同作用时,边坡水平永久位移时程响应几乎一致,而边坡竖向位移响应差异显著。Although seismic action is an important factor that causes slope instability and failure,whether vertical 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 monitoring 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 vertical 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 together,the slope permanent displacement time history response is almost the same,but the slope vertical displacement response is significantly different.

关 键 词：边坡工程 有限差分法 竖向地震作用 永久位移 

分 类 号：TV697.3[水利工程—水利水电工程]