1.南京工业大学岩土工程研究所,江苏 南京 211816
2.北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124
蒋家卫(1992—),男,博士后。主要从事地下结构抗震研究。E-mail:jjian224@njtech.edu.en
陈国兴(1963—),男,教授,博导,博士。主要从事岩土地震工程方面的研究。E-mail:gxchen2022@163.com
收稿:2022-08-21,
修回:2022-09-30,
纸质出版:2022-12-28
移动端阅览
蒋家卫,高权宝,陈国兴等.基于IDA方法地下结构易损性的地震动记录规模选取[J].防灾减灾工程学报,2022,42(06):1144-1152.
JIANG Jiawei,GAO Quanbao,CHEN Guoxing,et al.Quantification of Ground Motion Record Sets Scale in the IDA Method for Vulnerability Analysis of Underground Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1144-1152.
蒋家卫,高权宝,陈国兴等.基于IDA方法地下结构易损性的地震动记录规模选取[J].防灾减灾工程学报,2022,42(06):1144-1152. DOI: 10.13409/j.cnki.jdpme.20220821006.
JIANG Jiawei,GAO Quanbao,CHEN Guoxing,et al.Quantification of Ground Motion Record Sets Scale in the IDA Method for Vulnerability Analysis of Underground Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1144-1152. DOI: 10.13409/j.cnki.jdpme.20220821006.
旨在研究基于增量动力分析(IDA)方法的地下结构地震易损性分析中地震动记录集规模的选取。基于ABAQUS/Standard软件平台,建立地铁车站结构的土-结构相互作用分析的二维模型,选取了44条远程地震动加速度时程曲线为基准库,采用非线性时程动力分析方法,获取了结构在不同规模地震动记录样本作用下的动力响应。以层间位移角为结构损伤指标,
PGA
为地震动强度指标,绘制了IDA曲线簇并计算得到了不同工况的50%分位线。基于不同工况的结构震后失效概率与标准值的误差分析发现,地震动样本规模会显著影响地下结构基于IDA方法的地震易损性分析结果,随着评估性能水准等级的提升,地震动记录所带来的影响会越大。研究表明,基于IDA方法的地下结构地震易损性分析应不少于12条地震动记录,最佳输入地震动记录条数为28条。上述成果可为基于性能的地下结构抗震设计分析方法提供科学参考依据。
This paper is to study the selection of the ground motion record sets scale for vulnerability analysis of underground structures based on the incremental dynamical analysis (IDA) method. Utilizing ABAQUS/Standard platform, a two-dimension analysis model of a subway station underground structure was established. 44 time-history acceleration curves derived from far-field ground motion were selected as the standard value. The dynamic response of the structure under different scales of ground motion records was obtained by using the nonlinear time-history dynamic analysis method. The inter-story drift ratio was selected as the damage index, and the
PGA
was defined as the intensity index. The IDA
curve clusters were plotted and the 50% percentile curves under different working conditions were calculated. Based on the error analysis between the post-earthquake failure probability and the standard value of the structure under different working conditions, It was found that the scale of ground motion record sets could significantly affect the seismic vulnerability analysis results of the underground structure based on the IDA method, and the impact will upgrade with the rise of the evaluation performance level. The findings suggest that the ground motion records should not be less than twelve during the
IDA-based seismic fragility analysis of underground structure, and the optimal number of ground motion records is 28. The findings can provide a scientific reference for the performance-based seismic design analysis method of underground structures.
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