塑性应变能突变判据在重力坝动力抗滑稳定分析中的应用  

Application of Plastic Strain Energy Mutation Criterion in Dynamic Anti-Sliding Stability Analysis of Gravity Dam

作　　者：高剑峰 杨振亚 王正新 徐苏 周明明 GAO Jianfeng;YANG Zhenya;WANG Zhengxin;XU Su;ZHOU Mingming(Nanjing Water Planning and Designing Institute Co.,Ltd.,Nanjing 210001,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,China)

机构地区：[1]南京市水利规划设计院股份有限公司,江苏南京210001 [2]河海大学水利水电学院,江苏南京210098 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225127

出　　处：《红水河》2023年第5期5-8,22,共5页Hongshui River

基　　金：国家重点研发计划项目(2018YFC1508603)。

摘　　要：重力坝在地震作用下的抗滑稳定性较静力工况下的复杂许多,需要合适的判据对其稳定状态进行判别。笔者通过提取地震后的重力坝坝基塑性应变能,建立其与折减系数的关系曲线,以坝基震后塑性应变能突变为失稳判据分析重力坝在地震作用下的抗滑稳定性,并与传统的特征点位移突变、塑性区贯通判据计算结果进行对比。结果表明:采用塑性应变能突变判据与传统判据的计算结果相近,准确性有保证;塑性应变能突变判据通过观测坝基震后整体塑性应变能这一单值变量的变化趋势来判定重力坝抗滑稳定性,得到的结果唯一,是分析重力坝动力抗滑稳定性的较优选择。The anti-sliding stability of gravity dam under earthquake is much more complicated than that under static condition,and appropriate criteria are needed to judge its stable state.By extracting the plastic strain energy of the dam foundation of the gravity dam after the earthquake,the relationship curve between the plastic strain energy and the reduction coefficient is established.The plastic strain energy of the dam foundation after the earthquake is used as the instability criterion to analyze the anti-sliding stability of the gravity dam under the earthquake,and compared with the traditional characteristic point displacement mutation and plastic zone penetration criterion.The results show that the calculation results of the plastic strain energy mutation criterion are similar to those of the traditional criterion,and the accuracy is guaranteed The plastic strain energy mutation criterion determines the anti-sliding stability of gravity dam by observing the change trend of the single value variable of the overall plastic strain energy of the dam foundation after the earthquake,and the result is unique.It is a better choice for analyzing the dynamic anti-sliding stability of gravity dam.

关 键 词：重力坝 塑性应变能 强度折减法 位移突变 塑性区贯通 

分 类 号：TV642.3[水利工程—水利水电工程]