基于IDA的重力坝三维系统抗震性能研究

贺路翔1 陈灯红1 杨紫辉1 杨乃鑫1 孙豹1

(1.三峡大学土木与建筑学院, 湖北宜昌 443002)

【摘要】为了研究在地震作用下混凝土重力坝的整体抗震性能,以我国西南地区200 m级的光照混凝土重力坝为例,建立了整体大坝的坝体-库水-地基系统三维有限元模型,基于增量动力分析法对该模型进行了地震响应分析及地震易损性分析。根据整体大坝模型的增量动力分析计算结果,分别提取了坝顶和底孔的位移进行IDA曲线、分位曲线以及地震易损性曲线的绘制。结果表明地震波的PGA在0. 2 g以下时,坝体出现破坏的概率很低; PGA为0. 3 g以下时,可满足坝体基本功能保障;PGA在0. 6 g以下时,能满足坝体基本安全保证。

【关键词】 混凝土重力坝; 三维模型; 增量动力分析; 地震易损性;

【DOI】

【基金资助】 国家自然科学基金项目(51309143) National Natural Science Foundation of China(51309143) 湖北省自然科学基金项目(2018CFB652) Natural Science Foundation of Hubei Province(2018CFB652) 流域水循环模拟与调控国家重点实验室开放研究基金(IWHR-SKL-201716) Open Research Fund of State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin(IWHR-SKL-201716)

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This Article

ISSN:1004-4574

CN: 23-1324/X

Vol 28, No. 04, Pages 159-168

August 2019

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Article Outline

摘要

  • 1 基于IDA的抗震分析方法
  • 2 工程概况与计算分析
  • 3 整体极限抗震能力研究
  • 4 全坝段破坏模式分析
  • 5 结语
  • 参考文献