基于多重网格法的拱坝坝肩动力稳定分析  

Dynamic Stability Analysis of Arch Dam Abutment Based on Multi-grid Method

作　　者：项勋 任旭华[1] 张继勋[1] 朱代富 XIANG Xun;REN Xu-hua;ZHANG Ji-xun;ZHU Dai-fu(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;PowerChina Zhongnan Engineering Corporation Limited,Changsha 410014,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建集团中南勘测设计院有限公司,湖南长沙410014

出　　处：《水电能源科学》2022年第12期133-137,共5页Water Resources and Power

基　　金：中央高校基本科研业务费专项资金项目(B220204001);云南省重大科技专项计划(202102AF080001)。

摘　　要：地震荷载下拱坝坝肩稳定是坝体抗震安全评价的关键课题,以某拱坝工程实例为依托,基于黏弹性人工边界进行带缝拱坝地震分析,采用多重网格法将计算得到应力结果插值投影至潜在滑面、滑块得到相应的应力场。通过将滑面应力对面积积分获取滑面滑力及阻滑力,并计算得到各滑面和滑块整体安全系数。计算表明,以多重网格为纽带,有限元和刚体极限平衡法相结合的稳定分析方法能有效计算动力工况下潜在块体稳定系数时程变化,具有一定的工程参考价值。The stability of arch dam abutment under seismic load is the key topic of the seismic safety evaluation of the dam body,relying on an example of an arch dam project,this paper conducted seismic analysis of the arch dam with a seam based on the viscoelastic artificial boundary.The multiple mesh method was used to interpolate the calculated stress result into the potential sliding surface and the slider to obtain the corresponding stress field.By integrating the sliding surface stress on the area,the sliding surface sliding force and the sliding force were obtained,and the overall safety factor of each sliding surface and slider was calculated.Calculation shows that the stability analysis method combining finite element and rigid body limit balance method with multiple meshes as the link can effectively calculate the time course change of the potential block stability coefficient under dynamic conditions,and has certain engineering reference value.

关 键 词：多重网格法 坝肩动力稳定分析 黏弹性人工边界 附加质量法 

分 类 号：TV743[水利工程—水利水电工程] TU457[建筑科学—岩土工程]