车辆荷载作用下城市桥梁与地铁车站合建体结构动力响应研究  

Dynamic response analysis of the composite structure of metro station and urban bridge under vehicle loads

作　　者：王博[1] 康华[1] 高志宏[1] 毛念华[1] 马辉[2] 贾晨俊 谢钟辉 WANG Bo;KANG Hua;GAO Zhihong;MAO Nianhua;MA Hui;JIA Chenjun;XIE Zhonghui(China Railway First Survey and Design Institute Group Co.,Ltd,Research Institute of Urban Rail and Architectural Design,Xi’an 710043,China;Faculty of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]中铁第一勘察设计院集团有限公司城市轨道与建筑设计研究院,陕西西安710043 [2]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《西安理工大学学报》2022年第1期121-132,共12页Journal of Xi'an University of Technology

基　　金：陕西省自然科学基础研究计划资助项目(2019JM-193);铁一院科学研究计划项目(院科19-57-1)。

摘　　要：为研究车辆荷载作用下地铁车站与城市桥梁合建体结构的动力响应规律,以国内某地铁车站为研究对象,采用MIDAS GTS建立了合建体结构的三维有限元模型,根据车辆动荷载激励公式,将不同车辆荷载简化后作用于合建体结构,分析车辆荷载、车辆速度等因素对结构动力特性及响应的影响规律。结果表明:合建体结构的竖向位移、竖向加速度、应力大小均随车速或车辆荷载的增加而逐渐增大;在车辆荷载分析范围内,车辆荷载引起的合建体结构的最大竖向位移为2.593 mm,明显小于规范的上限值10 mm,而车辆荷载引起的合建体结构的最大竖向加速度为6.293 cm/s^(2),远小于规范的限值150 cm/s^(2)。车辆作用下,合建体结构的桥墩上部、转换梁与车站顶板结合处、顶板与侧墙交界处、板柱结合处等均出现了较大的应力集中现象,故需要对上述部位进行加强设计。To study the dynamic response of the composite structure of subway station and urban bridge under the vehicle loads, a domestic subway station was taken as the research object, with the MIDAS GTS used to establish a three-dimensional finite element model of structure. According to the excitation formula for the dynamic loads of vehicles, the different vehicle loads were simplified and then applied to the structure. The dynamic response characteristics and rules of the structure under vehicle loads and speeds were analyzed in detail. The results show that the vertical displacement, acceleration and stress of the structure increase with the increase of vehicle speeds or loads. In the range of vehicle load analysis, the maximum vertical displacement of structure caused by the vehicle loads is 2.593 mm, which is obviously less than the upper limit of the code by 10 mm. In addition, the maximum vertical acceleration of structure caused by the vehicle loads is 6.293 cm/s~2, which is also less than the limit value of the code by 150 cm/s~2. In addition, the stress concentration phenomenon appears in the upper part of bridge pier, the junction of the transfer beam and station roof, the junction between the roof and sidewall, and the joint of the slab and columns. Therefore, it is necessary to strengthen the design of the above parts in the structure.

关 键 词：地铁车站 城市桥梁 合建体 车辆荷载 动力响应 

分 类 号：TU398[建筑科学—结构工程]