地震波持时效应的能量评价指标研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (7) : 93-97.

论文

地震波持时效应的能量评价指标研究

刘哲锋1 晏梁1 陈逵2

作者信息 +

The energy evaluation indicator for ground motion duration effects on SDOF systems

Zhefeng Liu1 Liang Yan1 Kui Chen2

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文章历史 +

摘要

将结构的地震损伤定义为结构在单向振动过程中耗储地震能量能力的降低，并根据损伤成因将结构地震损伤分离为残余位移损伤与退化损伤，基于结构退化损伤的量值来界定地震波持时效应的大小。将结构总输入能、能量增长持时、最大瞬时输入能量比以及90%能量持时作为持时指标，通过 56条地震波下三种周期SDOF结构的损伤分析，分别讨论各持时指标与结构退化损伤之间的相关度。分析结果表明结构总输入能与结构退化损伤之间的相关度最高，同时由于总输入能的求解受结构阻尼模型与滞回模型的影响较小，因此总输入能作为地震波持时效应的评价指标具有较好的准确性与便利性。

Abstract

A new seismic damage model of SDOF systems is developed based on the variation of the strain energy dissipation capability during push-over process. The seismic damage index is divided into residual displacement damage index and degradation damage index according to the damage causes. Effect of ground motion duration on SDOF system is quantified as the degradation damage index. Based on the damage analysis of three SDOF structures with different period by 56 ground motions, correlation degree between 4 evaluation indicators (input energy, duration of input energy, ratio of maximum momentary input energy to input energy and 90% relative energy duration) and degradation damage index are investigated. The results show that the input energy which is affected indistinctively by damping model and hysteretic model is most correlated with the degradation damage index of SDOF system. Therefore, input energy is a nice evaluation indicator for ground motion duration effects on SDOF system.

导出引用

刘哲锋晏梁陈逵. 地震波持时效应的能量评价指标研究[J]. 振动与冲击, 2013, 32(7): 93-97

Zhefeng Liu Liang Yan Kui Chen. The energy evaluation indicator for ground motion duration effects on SDOF systems[J]. Journal of Vibration and Shock, 2013, 32(7): 93-97