基于声固耦合法的混凝土重力坝地震响应分析  

Seismic response analysis of concrete gravity dam based on acoustic‑structural coupling method

作　　者：刘奥博 王高辉[1,2] 卢文波[1,2] LIU Aobo;WANG Gaohui;LU Wenbo(State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education,Wuhan University,Wuhan430072,China)

机构地区：[1]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072 [2]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2024年第9期1213-1220,共8页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:52179140,51939008);湖北省自然科学基金杰出青年项目(编号:2021CFA093)。

摘　　要：为了探讨库坝相互作用对大坝动态响应的影响,采用声固耦合方法描述强震作用下库水-坝体的动态耦合过程及坝面动水压力分布特征,建立大坝-库水-地基耦合系统的动力响应分析模型,研究了强震作用下坝体的损伤发展过程,通过与实际震害、模型试验及已有研究成果对比,验证了计算方法的可靠性;同时从大坝位移和应力响应特征及破坏形态等方面对比分析了声固耦合方法和传统附加质量法在模拟库坝相互作用过程时的差异。结果表明:地震动水压力会显著提高大坝的非线性动态响应,采用声固耦合方法可以有效模拟大坝损伤发展过程及坝面动水压力分布特征,相较于附加质量法,采用声固耦合法计算的坝体位移和应力响应结果与破坏形态更加符合实际情况。In order to explore the influence of dam-reservoir interaction on dam dynamic response,the acoustic�structural coupling method is used to describe the dynamic coupling process of reservoir water and dam body and the distribution characteristics of hydrodynamic pressure on the dam surface under strong earthquake action.The dynamic response analysis model of dam-reservoir water-foundation coupling system is established to study the damage development process of the dam body under strong earthquake action.Through comparing with actual earthquake damage,model test and existing research results,the reliability of the calculation method is verified.Besides,the differences between the acoustic-structural coupling method and the traditional additional mass method in simulating the interaction process of reservoir water and dam are compared from the aspects of dam displacement,stress response characteristics and failure mode.The results show that the seismic hydrodynamic pressure can significantly enhance the nonlinear dynamic response of the dam,the acoustic-structural coupling method can effectively simulate the damage development process of the dam and the distribution characteristics of hydrodynamic pressure on the dam surface.The response results of displacement,stress and failure mode of the dam body calculated by acoustic-structural coupling method are more in line with the actual situation than by additional mass method.

关 键 词：重力坝 声固耦合法 附加质量法 地震响应 破坏模式 

分 类 号：TV312[水利工程—水工结构工程]