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
刘奥博 1王高辉 1卢文波1
作者信息
- 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;武汉大学水工岩石力学教育部重点实验室,湖北武汉 430072
- 折叠
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.
Abstract
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Key words
gravity dam/acoustic-structural coupling method/additional mass method/seismic response/failure mode引用本文复制引用
基金项目
国家自然科学基金项目(52179140)
国家自然科学基金项目(51939008)
湖北省自然科学基金杰出青年项目(2021CFA093)
出版年
2024
NETL
NSTL
万方数据