深圳大学学报理工版

姜京伟,李静波,崔春义,等.基于双参数模型的地铁车站地震易损性分析[J].深圳大学学报理工版,2021,38(5):496-503.[doi:10.3724/SP.J.1249.2021.05496]
JIANG Jingwei,LI Jingbo,CUI Chunyi,et al.Seismic vulnerability analysis of subway station based on two-parameter model[J].Journal of Shenzhen University Science and Engineering,2021,38(5):496-503.[doi:10.3724/SP.J.1249.2021.05496]

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基于双参数模型的地铁车站地震易损性分析

姜京伟¹,李静波²,崔春义²,许民泽²,苏健³,张鹏²

1)山西省交通科学研究院,山西太原030006; 2)大连海事大学土木工程系,辽宁大连116026; 3)大连海洋大学海洋与土木工程学院,辽宁大连116023

关键词：岩土工程; 地铁车站结构; 地震易损性; 饱和砂土; 层间位移角; 双参数损伤模型

Seismic vulnerability analysis of subway station based on two-parameter model

JIANG Jingwei¹, LI Jingbo², CUI Chunyi², XU Minze², SU Jian³, and ZHANG Peng²

1)Shanxi Transportation Research Institute, Taiyuan 030006, Shanxi Province, P.R.China;2)Department of Civil Engineering, Dalian Maritime University, Dalian 116026, Liaoning Province, P.R.China;3)College of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023, Liaoning Province, P.R.China

Keywords： geotechnical engineering; subway station structure; seismic vulnerability; saturated sandy; inter-story displacement drift angle; two-parameter damage model

DOI: 10.3724/SP.J.1249.2021.05496

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为研究地震作用下地铁车站结构的动力响应及损伤状况,以某单层双跨地铁车站为研究对象,建立饱和砂土场地下地铁车站结构非线性动力体系数值模型.采取增量动力响应分析的方法,分别选取层间位移角模型和基于变形-能量的双参数损伤模型,对地铁车站结构进行地震易损性分析,从而求解地铁车站结构在不同地震烈度下的极限状态超越概率.分析结果表明:地面峰值加速度小于0.2g时结构偏于安全,损伤以轻度损伤为主; 地面峰值加速度大于0.2g时,逐渐向中等损伤及更严重损伤过渡; 结构损伤程度较轻(轻微损伤和中等损伤)时,最大变形对结构损伤起主要控制作用; 结构损伤严重(严重损伤和倒塌)时,累计滞回耗能对结构的损伤起到关键作用.研究结果可为地铁车站结构的防灾减灾及抗震设计提供参考.

In order to study the dynamic response and damage status of subway station structure under earthquake, we establish a numerical model of nonlinear dynamic system of subway station under saturated sand soil. By using the incremental dynamic analysis method, we select the inter-story displacement drift angle and deformation-energy index of a two-parameter model to investigate the seismic vulnerability of the subway station structure and thus to obtain the exceedance probability of the limit state of subway station structure under different seismic intensities. The results show that when the peak ground acceleration(PGA)is less than 0.2g, the structure is safe and the damage is mainly mild; when PGA is greater than 0.2g, the damage is moderate and more severe. The maximum deformation plays a major role in controlling the structural damage when the structural damage degree is mild(slight or moderate damage). When the damage of the structure is serious(serious damage or collapse), the cumulative hysteretic energy consumption plays a key role in the damage of the structure. The research can provide reference for disaster prevention and seismic design of subway station structure.

引言
1 数值模型的建立
2 损伤模型与量化指标选取
3 地铁车站结构地震易损性分析
4 结论

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