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基于MSA法的高心墙堆石坝地震沉降易损性分析

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Indexed by:期刊论文

Date of Publication:2017-07-21

Journal:水利学报

Included Journals:Scopus、EI、CSCD

Volume:48

Issue:7

Page Number:866-873

ISSN No.:0559-9350

Key Words:高心墙堆石坝;地震沉降变形;易损性分析;MSA法;破坏等级

Abstract:多条带分析法(MSA)是新近提出的一种针对离散强度因子的易损性分析方法,为结构安全评估提供了有效路径,但目前在土石坝工程领域应用较少.本文针对高心墙堆石坝,选取坝顶震陷率为性能指标,建议了轻度、中度和重度破坏三个等级;考虑地震动的随机性,采用MSA法开展了易损性研究,得到了不同破坏等级的易损性曲线和概率,为大坝的强震性能评价提供准则和参考;不同条带数量下地震易损性分析结果表明,适当减少水平条带数量,对易损性结果影响不大,这有利于计算工况的减少.

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