【摘要】 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。更多还原

【Abstract】 The work to classify the earthquake disaster is a basic work for seismic vulnerability analysis,but the classification standard is uncertain in the area of gravity dam seismic analysis. In this paper,based on the concrete damage mechanic model,by considering the location of the damage area in the whole structure,a new damage index assessment model is put forward. Also,the corresponding relationship between the seismic damage level and the damage index is established according to statistic damage results of the Koyna and five domestic gravity dams during earthquake. Finally,the quantitative evaluation model using damage index is set up to take the place of the damage assessment model using failure modes. This work can provide reference for the seismic vulnerability analysis of the gravity dam.更多还原