摘要
为了评估装配式地下结构的抗震性能,加快其在地下工程中的推广应用,提出了装配式地铁车站结构抗震性能指标限值的标定方法,基于动力增量分析方法建立了不同类别场地内两层三跨装配式地铁车站结构的地震易损性曲线,并对其不同性能状态的损伤概率进行了评估。分析结果表明:地震动特性和场地类别对装配式地铁车站结构的动力响应有显著影响,场地等效剪切波速越低,地震动特性对结构的影响越显著且结构越容易遭受地震破坏;9度抗震设防地面峰值加速度为0.4g时,该结构埋置于Ⅰ类场地时仅有6.7%的概率出现破坏且为轻微破坏;于Ⅱ类场地发生轻微破坏的概率为26.3%,超越轻微破坏的概率为3.8%;Ⅲ类场地中结构以轻微破坏和中等破坏为主,概率分别为42.1%、20.5%,超越中等破坏的概率为10.8%。同时,给出了两层三跨装配式地下结构的地震易损性曲线和地震损伤概率表,可以快速评价该类型地下结构抗震性能。
In order to evaluate the seismic performance of prefabricated underground structures and promote their application in underground engineering,a method for calibrating the limit values of the seismic performance index of prefabricated subway station structures was proposed.Then,based on the incremental dynamic analysis method,the seismic vulnerability curves of the two-story three-span prefabricated subway station structure in different site categories were established,and the damage probabilities of different performance states were evaluated.The analysis results show that seismic characteristics and site categories have significant influence on the dynamic response of prefabricated subway station structure.The lower the equivalent shear wave velocity of the site,the more significant the effect of ground motion on underground structure and the easier it is to suffer from seismic damage.In the case of seismic fortification of 9-degree(APG is 0.4g),when this structure is embedded in classⅠsite,only 6.7%of the probability of damage occurs and the damage is minor;in classⅡsite,the probability of minor damage is 26.3%,and the probability of exceeding minor damage is 3.8%;the structure in classⅢsite is dominated by minor damage and moderate damage,the probabilities are 42.1%and 20.5%respectively,and the probability of exceeding moderate damage is 10.8%.At the same time,the given vulnerability curves and damage probability table of the two-story three-span prefabricated subway station structure can be used to quickly evaluate the seismic performance of this type structure.
作者
陈晋男
杜修力
许成顺
刘洪涛
蒋家卫
刘迪
CHEN Jinnan;DU Xiuli;XU Chengshun;LIU Hongtao;JIANG Jiawei;LIU Di(Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第7期37-46,共10页
Journal of Building Structures
基金
国家自然科学基金项目(U1839201)
国家重点研发计划(2018YFC1504305)。
关键词
装配式地铁车站
抗震性能
地震易损性
增量动力分析
损伤概率
prefabricated subway station
seismic performance
seismic vulnerability
incremental dynamic analysis
damage probability
