基于损伤指数模型的重力坝地震破坏等级划分  

Classification of earthquake damage to gravity dams based on a damage index model

作　　者：王超[1] 张社荣[1] 黎曼[1] 王高辉[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《地震工程与工程振动》2014年第6期218-226,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金创新研究群体科学基金项目(51321065);国家自然科学基金项目(51379141);天津市应用基础与前沿技术研究计划(13JCYBJC19400)

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。The work to classify the earthquake disaster is a basic work for seismic vulnerability analysis, but theclassification 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 in- dex assessment model is put forward. Also, the corresponding relationship between the seismic damage level andthe damage index is established according to statistic damage dunng earthquake damage assessment Finally, the quantitative evaluation model model using failure modes. This work can results of the Koyna and five domestic gravity dams using damage index is set up to take the place of the provide reference for the seismic vulnerability analysisof the gravity dam.

关 键 词：重力坝 地震破坏等级划分 混凝土塑性损伤 损伤指数模型 

分 类 号：TV312[水利工程—水工结构工程] TU311[建筑科学—结构工程]