浮置板轨道沿线砖混建筑物振动响应及楼内振动传播规律  

Vibration Response and Internal Vibration Propagation Law of Brick-Concrete Buildings Along Floating Plate Track Line

作　　者：刘悦 谭新宇 姜博龙 刘冀钊 陈江雪 LIU Yue;TAN Xinyu;JIANG Bolong;LIU Jizhao;CHEN Jiangxue(China Academy of Transportation Sciences,Beijing 100029,China;Technology National Engineering Research Center for Digital Construction and Evaluation of Urban Rail Transit,China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]交通运输部科学研究院,北京100029 [2]中国铁路设计集团有限公司城市轨道交通数字化建设与测评技术国家工程研究中心,天津300308

出　　处：《交通运输研究》2023年第5期97-104,共8页Transport Research

基　　金：中央级公益性科研院所基本科研业务费项目(20224805);天津市科技计划项目(22JCQNJC01710);中国铁路设计集团有限公司科技开发课题(2021A241005)。

摘　　要：为探究浮置板轨道沿线砖混结构建筑物振动水平和振动传播衰减规律,弥补现有减隔振措施在设计及选用方面存在的不足,建立地铁浮置板轨道沿线建筑物振动仿真预测模型,对浮置板轨道线路沿线建筑物的楼内振动响应进行计算分析。以某运营地铁浮置板轨道线路为例,建立了地铁列车-浮置板轨道频域耦合解析模型及道床-隧道-地层-建筑物有限元仿真模型,利用实测数据对模型进行校核,分析建筑物各层分频振动特性。研究发现:浮置板轨道线路沿线建筑物内的振动响应同时受到浮置板轨道固有频率、建筑物自身固有模态频率以及轮轨共振频率的影响;楼内不同楼层、同一楼层不同房间的振动响应差异较大,分频振级最大差值可达15 dB以上。故在进行减隔振设计时,需根据保护对象所在建筑物内的具体楼层及位置进行减隔振措施的针对性设计,并提高减振轨道设计的频率匹配意识,避免减振轨道的粗放使用。In order to explore the vibration level and vibration propagation attenuation law of brickconcrete buildings along the floating slab track,and to make up for the shortcomings in the design and selection of existing vibration reduction and isolation measures,this article established a simulation and prediction model for building vibration along the metro line considering floating slab track,and calculated the vibration response inside the buildings along the line.Taking an operational floating slab track as the background,a train-floating slab track coupled analytical model in the frequency domain and a finite element simulation model of tunnel-soil-building were established.The models were verified with in-site measured data,and the frequency division vibration characteristics of each floor of a building were analyzed.The results show that:the vibration response inside the buildings along the floating slab track line is simultaneously affected by the natural frequency of the floating slab track,the inherent modal frequency of the building,and the wheel-rail resonance frequency;the vibration response of different floors and rooms on the same floor in the building varies greatly,with the maximum difference in frequency division vibration levels reaching over 15 dB.Therefore,targeted design of vibration reduction and isolation measures should be carried out based on the specific floor and position of the building where the protected object is located when the vibration reduction and isolation design is needed,and the frequency matching awareness of vibration reduction track design should be improved to avoid the extensive use of vibration reduction tracks.

关 键 词：地铁 钢弹簧浮置板轨道 振动预测 室内振动 减振效果 

分 类 号：TB535[理学—物理] U213.2[理学—声学]