翁结水库碾压混凝土重力坝动力特性及其抗滑稳定分析  

Dynamic Characteristics and Anti-sliding Stability Analysis of Wengjie RCC Gravity Dam

作　　者：严克兵 杨翔 朱代富 任旭华[2] 张继勋[2] YAN Kebing;YANG Xiang;ZHU Daifu;REN Xuhua;ZHANG Jixun(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;POWERCHINA Zhongnan Engineering Co.,Ltd.,Changsha 410014,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,郑州450003 [2]河海大学水利水电学院,南京210098 [3]中国电建集团中南勘测设计研究院有限公司,长沙410014

出　　处：《三峡大学学报（自然科学版）》2024年第2期35-41,共7页Journal of China Three Gorges University：Natural Sciences

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

摘　　要：重力坝是水利工程中最常用的主要水工建筑物之一,混凝土重力坝在地震作用下的动力稳定是坝工设计中的重要问题.本文以翁结碾压混凝土重力坝为对象,取位于河谷中的7、8号溢流坝段和9号非溢流坝段,建立三维有限元模型,通过计算分析了碾压混凝土重力坝在不同工况下的应力变形规律及抗滑稳定性.结果表明:静力荷载作用下,坝体位移符合重力坝一般规律,坝踵主拉应力范围较小;动力荷载作用下,位移等响应在坝顶达到最大,符合鞭鞘效应特征,同时坝体残余位移较小,坝体在一些部位出现瞬时拉应力超标现象,坝基塑性区未发生贯通;对7、8号坝段和9号坝段在建基面及碾压层面进行抗滑稳定验算,坝体坝基均满足稳定要求.Gravity dam is one of the most commonly used hydraulic structures in hydraulic engineering.The dynamic stability of concrete gravity dam under earthquake is an important issue in dam design.The 7#and 8#overflow dam sections and 9#non-overflow dam sections of Wengjie RCC gravity dam are selected for case studied.A three-dimensional mechanical and finite element analysis model is established to analyze the stress,deformation and anti-sliding stability of the RCC gravity dam under different working conditions.The results show that under the static load,the displacement of dam conforms to the general law of gravity dam,and the main tensile stress range of dam heel is small.Under the dynamic load,the displacement response and acceleration response reach the maximum at the dam crest,which conforms to the whiplash effect characteristics.At the same time,the residual displacement of the dam is small,and the instantaneous tensile stress in some parts of the dam exceeds the standard,the plastic zone has not penetrated;The anti-sliding stability is verified on the foundation surface and rolling layer of dam monoliths 7#,8#and 9#.The dam and its foundation meet the stability requirements.

关 键 词：碾压混凝土重力坝 有限元法 静力分析 动力特性 稳定性 

分 类 号：TV642[水利工程—水利水电工程] TV312