考虑近断层强震影响的铁路站房抗震韧性评估  

Seismic Resilience Evaluation of Railway Station Building Considering Strong Seismic Influence of Near-Fault

作　　者：潘毅[1,2] 宋佳雨 包韵雷 申允 陈强[3] PAN Yi;SONG Jiayu;BAO Yunlei;SHEN Yun;CHEN Qiang(School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Key Laboratory of Seismic Engineering of Sichuan Province,Chengdu Sichuan 610031,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu Sichuan 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]抗震工程技术四川省重点实验室,四川成都610031 [3]中国中铁二院工程集团有限责任公司,四川成都610031

出　　处：《中国铁道科学》2022年第6期9-19,共11页China Railway Science

基　　金：国家自然科学基金资助项目(52278534);四川省自然科学基金资助项目(2022NSFSC0423)。

摘　　要：由于铁路选线限制,一些铁路站房修建在地震高烈度区,且临近地震断裂带。为掌握近断层强震作用下铁路站房维持与恢复原有功能的能力,选取某典型铁路站房为研究对象,评估考虑近断层强震影响的铁路站房抗震韧性。首先,分别采用近断层设计谱和抗震规范设计谱对铁路站房进行抗震设计;然后,选取24组近断层地震动,并建立铁路站房数值模型;最后,针对铁路站房结构的特点,并考虑近断层强震的影响,对铁路站房进行抗震韧性评估。结果表明:在8度罕遇地震作用下,考虑近断层强震影响的铁路站房修复费用为882.82万元,修复时间为21.20 d,受伤率为1.25×10^(-4),死亡率为1.25×10^(-5),比不考虑时的铁路站房各项值均有降低;考虑近断层强震影响的铁路站房抗震韧性等级为二星,而不考虑时它的等级仅为一星。因此,在近断层区铁路站房的抗震设计中,宜采用近断层设计谱,以考虑近断层强震的不利影响,提高铁路站房的抗震韧性等级。Some railway station buildings are built in high-intensity seismic regions and close to seismic fault zones due to the restrictions on railway route selection.In order to master the ability of the railway station building to maintain and restore its original functions under the strong seismic action of near-fault,a typical railway station building was selected as the research object and the seismic resilience evaluation of the railway station building considering the strong seismic influence of near-fault was carried out.Firstly,the seismic structure of railway station building was designed based on the near-fault design spectrum and the standard seismic design spectrum,respectively.Then,24 sets of near-fault ground motions were selected,and the numerical model of railway station building was established.Finally,according to the characteristics of the railway station building structure,the seismic resilience evaluation of the railway station building was carried out considering the strong seismic impact of near-fault.The results show that under the action of the rare earthquake of degree 8,the repair cost for the railway station building considering the strong seismic influence of near-fault is 8.8282 million yuan,the repair time takes 21.20 d,the injury rate is 1.25×10^(-4),and the death rate is1.25×10^(-5).The figures are all lower than those of the railway station building designed without considering the influence.The seismic resilience level of the railway station building considering the strong seismic influence of near-fault rates two stars,while the level without considering the influence only rates one star.Therefore,it is suitable to adopt the near-fault design spectrum for railway station building design in near-fault zone.This is to consider the negative strong seismic influence of near-fault and to improve the seismic resilience level of railway station buildings.

关 键 词：铁路站房 近断层强震 近断层抗震设计谱 抗震韧性评估 抗震韧性等级 

分 类 号：TU352.11[建筑科学—结构工程]