近断层脉冲型地震动对重力坝深层抗滑稳定性的影响  

Influence of Near-fault Pulse-like Ground Motion on Deep Anti-sliding Stability of Gravity Dam

作　　者：马力 顾冬 罗坤 崔笑 贾玉豪 MA Li;GU Dong;LUO Kun;CUI Xiao;JIAYuhao(Nanjing Water Conservancy Planning and Design Institute Co.,Ltd,Nanjing 210000,China;School of Water Resources and Hydropower,Hohai University,Nanjing 210098,China;Design and Research Institute of Beijing Survey,Power Construction Corporation of China,Beijing 100024,China;Shanghai Survey Design and Research Institute Co.,Ltd,Shanghai 200335)

机构地区：[1]南京市水利规划设计院股份有限公司,江苏南京210000 [2]河海大学水利水电学院,江苏南京210098 [3]中国电建集团北京勘测设计研究院有限公司,北京100024 [4]上海勘测设计研究院有限公司,上海200335

出　　处：《安徽工业大学学报（自然科学版）》2022年第4期410-415,共6页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金项目(51579085)。

摘　　要：以我国西南某重力坝溢流坝段为研究对象,采用非线性有限元分析软件ADINA建立能反映坝体-坝基-库水动力相互作用及坝基滑裂面的三维有限元模型,从坝基塑性区分布、接触面状态及关键点滑移量3个方面模拟分析近断层脉冲型与非脉冲型地震动对重力坝深层抗滑稳定性的影响。结果表明:相较于非脉冲型地震动,脉冲型地震动作用后坝基产生塑性破坏的范围、接触面处于滑动和脱开状态的范围以及坝踵关键点震后位移更大;脉冲型地震动作用下大坝更易产生滑动失稳,不可忽视近断层脉冲型地震动对大坝动力稳定的影响。Taking a gravity dam in southwest China as the research object,a three-dimensional finite element model which can reflect the dam body-foundation-reservoir hydrodynamic interaction and foundation slip surfaces was established by using nonlinear finite element analysis software ADINA.The influences of near-fault pulse type and non-pulse type ground motion on the anti-sliding stability of gravity dam were studied from three aspects of the distribution of foundation plastic zone,the state of contact surfaces and the slip of key points.The results show that the plastic zone of dam foundation,the range of the contact surfaces in the slipping and opening state and the post-earthquake displacement of key points of dam heel are larger than those of the non-pulse ground motion.The dam is more prone to instability under the action of pulse ground motion,and the influence of near-fault pulse ground motion on the dynamic stability of the dam cannot be ignored.

关 键 词：重力坝 近断层脉冲型地震动 抗滑稳定性 接触面 

分 类 号：TV312[水利工程—水工结构工程]