地铁列车振动对相邻建筑物的影响及其传播规律
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摘要
在某地建于地铁线路附近的两栋装有隔震装置和一栋没有安设隔震装置的建筑物内,对地铁列车运行引起的振动进行了监测,并对地面结构的振动进行了数值模拟,然后对记录的振动波和数值计算结果进行了分析与对比,发现随着建筑物高度的增加,振动峰值呈余弦函数变化;地铁列车运行在建筑物内引起的振动时程的主要频率成分集中在22～40Hz之间;安置在建筑物底部的隔震阻尼器对地铁运行诱发的振动波的阻隔作用不大;地铁列车运行引起的加速度值很小,不会对混凝土结构产生破坏,但生活在建筑物内的人群却能明显的感觉到振动;建筑物的振动不会表现出该振动波的特性,而是表现出本身的振动频率特性。因此,改变结构的动力特性是无法减小地铁列车运行引起的振动,而只能通过减弱振源来减轻振动,比如在轨道加隔振垫、挖隔振沟等。
The vibration of the three buildings induced by the subway train motion is recorded.Among them,at the bottom of two the shock insulation apparatuses are set up,and at the end of another there is no this kind of apparatuses.Then the numerical calculation is made on the non-isolation building.After analysis and comparison of the recorded vibration waves and the numerical calculation results,the following are found: with the height increase the vibration acceleration is changing in cosine function;the frequencies of the vibration waves mainly lie in 22~40Hz induced by the subway train motion;the shock insulation apparatuses basically don't act on the subway-train-motion-induced vibration;the subway-train-motion-induced vibration acceleration value is small,but people can feel it clearly;the induced building vibration doesn't display the characteristics of the train motion,so the change of the building dynamic behavior doesn't reduce the subway-train-motion-induced vibration,and the efficient way is to weaken the train motion,like installing vibration isolating pad and digging the vibration isolating trough,and so on.
The vibration of the three buildings induced by the subway train motion is recorded.Among them,at the bottom of two the shock insulation apparatuses are set up,and at the end of another there is no this kind of apparatuses.Then the numerical calculation is made on the non-isolation building.After analysis and comparison of the recorded vibration waves and the numerical calculation results,the following are found: with the height increase the vibration acceleration is changing in cosine function;the frequencies of the vibration waves mainly lie in 22~40Hz induced by the subway train motion;the shock insulation apparatuses basically don't act on the subway-train-motion-induced vibration;the subway-train-motion-induced vibration acceleration value is small,but people can feel it clearly;the induced building vibration doesn't display the characteristics of the train motion,so the change of the building dynamic behavior doesn't reduce the subway-train-motion-induced vibration,and the efficient way is to weaken the train motion,like installing vibration isolating pad and digging the vibration isolating trough,and so on.
引文
[1]李晓霖.地铁诱发振动对地面以及地上结构的影响规律研究[D].北京:北京工业大学,2003.
[2]楼梦麟,李守纪,丁洁民,等.基于多点输入的地铁引起房屋振动评价研究[J].振动与冲击,2007,26(12):84-87.
[3]冯青松,雷晓燕,伍明辉.地铁运行列车引起建筑物低频振动的数值分析[J].铁道科学与工程学报,2007,4(2):68-72.
[4]栗润德,刘维宁,张鸿儒.区间地铁列车振动的地面响应测试分析[J].中国铁道科学,2008,29(1):120-126.
[5]TAO LIANJIN,LI XIAOLIN,ZHANG DINGSHENG.Evaluation of ground vibration indueed by subway[C]//Proceeding of Advances in Building Technology,Hong Kong:ELSEVIER,2002:587-594.
[6]陶连金,李晓霖,张丁盛.地铁诱发地面运动的衰减规律的研究[J].世界地震工程,2003,19(1):83-87.
[7]王逢朝,夏禾,张鸿儒.地铁列车振动对临近建筑物的影响[J].北方交通大学学报,1999,23(5):45-48.
[8]GB10071—88城市区域环境振动测量方法[S].
[9]GB10070—88城市区域环境振动标准[S].
[2]楼梦麟,李守纪,丁洁民,等.基于多点输入的地铁引起房屋振动评价研究[J].振动与冲击,2007,26(12):84-87.
[3]冯青松,雷晓燕,伍明辉.地铁运行列车引起建筑物低频振动的数值分析[J].铁道科学与工程学报,2007,4(2):68-72.
[4]栗润德,刘维宁,张鸿儒.区间地铁列车振动的地面响应测试分析[J].中国铁道科学,2008,29(1):120-126.
[5]TAO LIANJIN,LI XIAOLIN,ZHANG DINGSHENG.Evaluation of ground vibration indueed by subway[C]//Proceeding of Advances in Building Technology,Hong Kong:ELSEVIER,2002:587-594.
[6]陶连金,李晓霖,张丁盛.地铁诱发地面运动的衰减规律的研究[J].世界地震工程,2003,19(1):83-87.
[7]王逢朝,夏禾,张鸿儒.地铁列车振动对临近建筑物的影响[J].北方交通大学学报,1999,23(5):45-48.
[8]GB10071—88城市区域环境振动测量方法[S].
[9]GB10070—88城市区域环境振动标准[S].
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