地铁列车运行诱发临近低层建筑振动响应分析  

Analysis of Adjacent Low-rise Building Vibration Response Caused by Operation of Subway Trains on Curved Rail Segment

作　　者：郑帅 张巍[1] 孙可[1] 赵春发[2] 施毅 王鹏[1] 

机构地区：[1]南京大学地球科学与工程学院,江苏南京210046 [2]西南交通大学牵引动力国家重点试验室,四川成都610031 [3]苏州轨道交通集团有限公司,江苏苏州215003

出　　处：《南京工程学院学报（自然科学版）》2017年第3期1-7,共7页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(40902076);江苏省自然科学基金项目(BK20141224)

摘　　要：地铁曲线段轨道扭转效应加剧列车运行所诱发的环境振动响应.基于曲线段轮轨法向力与蠕滑力模型,计算得到B型车通过350 m小曲率半径线路时的动态轮轨力.以苏州轨道交通2号线某曲线区间段为例,建立隧道-土层-建筑物二维有限元模型,对地铁列车运行时紧邻地铁线路一座低层建筑的振动响应进行分析.共采取定员与超员条件下近侧列车通行、远侧列车通行以及两车会车等6种计算工况.结果表明:曲线段地铁列车运行诱发该建筑物产生垂直与水平向振动;超员会车最不利工况下,比较各楼层垂向分频振级与标准限值发现,在频率7.8 Hz各楼层分频振级均超过标准限值;该建筑物垂向振级随楼层升高基本保持不变,水平振级随楼层升高近似线性增大.Ambient vibration caused by trains’ running is worsened by torsional effect of subway trains’ rail segments. Based on the normal and creep forces between the wheel and rail on the curved rail segment, the dynamic forces between the wheel and rail of a B-type subway train passing the curved rail with a small curve radius of 350 m, were calculated. A certain curved segment of Metro Line 2 of Suzhou Rail Transit was used as an model for Tunnel-Soil-Construction, and the vibration response of an adjacent low-rise residential construction, under theexcitation of the operation of the subway trains, was analyzed. Six scenarios, including the nearside train passing, thefar-side train passing and the both train crossing, under the fix-number and overstaffing circumstances, respectively, wereused for the analysis. The results showthat both the vertical and horizontal vibrations occur when subway train runs on acurved rail segment; concerning the worst conditions when an overloaded train meets another train, vertical frequencyvibration levels of each storey was compared with the threshold values of the standard, showing that the frequency vibration levels exceed the threshold values at 7. 8 Hz; vertical vibration levels remain almost the same while the horizontal vibration levels increase linearly along with increases in the storey.

关 键 词：地铁列车 曲线轨道 环境振动 加速度峰值 振级 

分 类 号：TU311[建筑科学—结构工程]