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基于损伤指数模型的重力坝地震破坏等级划分

DOI: 10.13197/j.eeev.2014.06.218.wangc.027, PP. 218-226

Keywords: 重力坝,地震破坏等级划分,混凝土塑性损伤,损伤指数模型

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Abstract:

地震破坏等级划分是重力坝开展易损性分析的基础性工作,但在基于性能的重力坝抗震设计领域,其震害破坏等级划分标准尚无定论.本文基于混凝土塑性损伤力学模型,通过考虑损伤区域分布位置对重力坝整体结构的影响,提出基于整体损伤指数的重力坝破坏等级评价模型,并根据Koyna重力坝和国内5座典型重力坝地震损伤结果的统计分析,建立了损伤指数与大坝震害等级之间的对应关系;以损伤指数量化基于形态的震害等级划分标准,建立相应的量化评价模型,可为重力坝地震易损性分析提供参考.

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