基于位移的重力坝地震易损性分析方法

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (22) : 51-58.

论文

基于位移的重力坝地震易损性分析方法

马智勇1,2，张伟1,2，周强1,2，唐可人1,2

作者信息 +

A procedure for deformation-based seismic fragility analysis of gravity dam

MAZhi-Yong1,2, ZHANG Wei1,2, Zhou Qiang1,2, Tang Ke-Ren1,2

Author information +

文章历史 +

摘要

针对重力坝地震易损性分析中存在的性能指标参数敏感性大且难以获取、震害等级定量划分困难的问题，提出了基于位移性能指标和相应震害等级划分的重力坝易损性分析方法。首先，选取坝顶和坝颈相对坝踵的顺河向位移作为性能指标，合理选取输入地震波，采用非线性动力时程分析研究了性能指标与破坏形态及结构损伤间的相关性，提出了震害等级的五级划分标准；然后，结合SAC-FEMA的易损性概率分析方法，建立了基于位移的重力坝地震易损性分析方法，可估算重力坝在各级地震作用下出现各级震害的概率，为重力坝抗震设计、地震灾害预测和风险分析提供易损性分析基础。

Abstract

In order to solve the problems of parameter sensitivity of seismic performance indexes, and of difficulty to obtain these indexesand quantitatively determine the grade of seismic damage for gravity dam, a method for fragility analysisof gravity dam based on deformation performance index and the classification of the corresponding seismic damage level were proposed. The horizontaldeformations along the river at dam crest and neck relative to heelwere both selected as the performance indexes. The correlation between the deformations and failure modes as well as damage conditions were investigated by using reasonableseismic waves to perform nonlinear dynamic time history analyses. A five-level classification standard of seismic damage was proposed.The procedure for deformation-based seismic fragility analysis is presented by introducing the probabilistic analysis method in SAC-FEMA. The procedure can be employed to guide the design and evaluate the failure probability of gravity dams, and to provide basic information on hazard prediction and risk analysis.

导出引用

马智勇1,2，张伟1,2，周强1,2，唐可人1,2. 基于位移的重力坝地震易损性分析方法[J]. 振动与冲击, 2017, 36(22): 51-58

MAZhi-Yong1,2, ZHANG Wei1,2, Zhou Qiang1,2, Tang Ke-Ren1,2. A procedure for deformation-based seismic fragility analysis of gravity dam[J]. Journal of Vibration and Shock, 2017, 36(22): 51-58

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