Analysis of the Impact of the Scale of Co-built Structures with Subways on the Seismic Response
of Subway Stations
陶连金TAO Lian-jin;霍津 HUO Jin;石城 SHI Cheng;史明 SHI Ming
(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
( Key Laboratory of Ministry of Education for Urban and Engineering Safety and Disaster Reduction, Beijing University of Technology,Beijing 100124,China)
摘要:多种形式的一体化地铁车站实现了土地资源集约化利用,但地铁车站与共建结构间的相互作用也给抗震分析增加了复杂性。为研究共建结构对地铁车站地震响应的影响,建立单一地铁车站、不同共建结构规模的一体化车站有限元模型,对比了地震响应差异,结果表明;共建结构的存在放大了车站一体化区域的变形,减小了非一体化区域的变形;共建结构减小了地铁车站的峰值内力;悬挑跨与车站侧墙相交节点处受共建结构约束导致变形减小但弯矩增大。增加共建结构规模,地铁车站所受影响进一步增大,但其增长幅度有所下降。在进行结构设计时应对车站一体化区域、节点处应进行加固处理。上述分析为大型交通枢纽一体化地铁车站的抗震设计提供了依据。
Abstract: Various forms of integrated subway stations have achieved intensive utilization of land resources, but the interaction betweensubway stations and co built structures has also added complexity to seismic analysis. To study the impact of co built structures on theseismic response of subway stations, an integrated finite element model of a single subway station with different co built structure scales wasestablished The differenees in seismie response were compared. The results showed that the presence of co bult struetures magnified thedeformation of the integrated area of the station and reduced the deformation of the non integrated area. The co construction structurereduces the peak internal force of subway stations. The intersection node between the eantilever span and the station side wall is constrainedby the co built structure, resulting in reduced deformation but increased bending moment. By increasing the scale of co constructionstructures, the impact on subway stations has further inereased, but their growth rate has deereased. When designing the structure,reinforcement should be applied to the integrated area and nodes of the station. The above analysis provides a basis for the seismic design oflarge-scale transportation hub integrated subway stations.
关键词:一体化地铁车站结构;地震响应;数值模拟
Key words: integrated subway station structure; earthquake response; numerical simulation
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