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1.西安理工大学土木建筑工程学院,陕西 西安 710048
2.陕西铁路工程职业技术学院,陕西 渭南 714099
3.中国建筑西北设计研究院有限公司,陕西 西安 710048
4.大连理工大学工业装备结构分析国家重点实验室, 辽宁 大连 116024
Received:19 November 2021,
Revised:2022-04-01,
Published:28 August 2023
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郭宏超,张思嘉,雷天奇等.基于IDA的西安站改东配楼结构地震易损性分析[J].防灾减灾工程学报,2023,43(04):721-731.
GUO Hongchao,ZHANG Sijia,LEI Tianqi,et al.IDA‑based Seismic Vulnerability Analysis of the Structure of the Modified East Side Building of Xi′an Railway Station[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):721-731.
郭宏超,张思嘉,雷天奇等.基于IDA的西安站改东配楼结构地震易损性分析[J].防灾减灾工程学报,2023,43(04):721-731. DOI: 10.13409/j.cnki.jdpme.20211119001.
GUO Hongchao,ZHANG Sijia,LEI Tianqi,et al.IDA‑based Seismic Vulnerability Analysis of the Structure of the Modified East Side Building of Xi′an Railway Station[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):721-731. DOI: 10.13409/j.cnki.jdpme.20211119001.
为评估复杂连体结构在地震作用下的抗震性能,通过增量动力分析法对结构整体的抗震性能进行易损性分析。分别将最大层间位移角,扭转角和损伤参数作为DM值,获取结构易损性曲线,根据超越概率密度函数得到了各部件和整体结构的易损性矩阵。结果表明:在不同工况的
PGA
输入下,连体结构各部分均能满足抗震规范所规定的8度罕遇地震的要求,大跨桁架始终满足抗震性能要求;随着整体结构破坏程度的不断加大,角钢预埋件的破坏随着大跨桁架在强震作用下扭转的增大而逐渐增大,各水准的超越概率均大于其它部分的超越概率,因而大跨桁架支座端的角钢预埋件1和2是决定连体结构整体抗震性能的关键。
In order to evaluate the seismic performance of complex conjoined structures under earthquake action, the vulnerability analysis of the seismic performance of the whole structure was carried out by means of incremental dynamic analysis. Taking the maximum inter-story drift angle, torsion angle and damage parameters as DM values, respectively, the structural fragility curve was obtained, and the fragility matrix of each component and the whole structure was obtained according to the transcendental probability density function. The results show that: under the input of
PGA
in different working conditions, every part of the conjoined structure can meet the requirements of the 8 degree rare earthquake stipulated in the seismic code, and the long-span truss always meets the seismic performance requirements; the damage of the angle steel embedded parts gradually increases with the increase of the torsion of the large-span truss under the action of the strong earthquake, and the exceeding probability of each level is greater than that of other parts. Embedded parts 1 and 2 are the key to determining the overall seismic performance of the connected structure.
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