| 地铁运营引起的环境低频振动传播特征试验研究 |
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| 引用本文： | 丁德云,刘维宁,李克飞,王文斌,马蒙.地铁运营引起的环境低频振动传播特征试验研究[J].中国铁道科学,2011,32(2). |
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| 作者姓名： | 丁德云 刘维宁 李克飞 王文斌 马蒙 |
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| 作者单位： | 1. 北京交通大学,土木建筑工程学院,北京,100044;北京城建设计研究总院有限责任公司,北京,100037
2. 北京交通大学,土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金资助项目(51008017); 中央高校基本科研业务费专项资金资助项目(2009JBM074,2009JBM075); 北京交通大学博士创新基金资助项目(141067522) |
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| 摘 要： | 为了分析地铁运营造成的环境低频(<20 Hz)振动,进行试验室低频振动试验研究。通过试验获得离散频率(5~16 Hz)简谐荷载下隧道内、地表和建筑物内的振动加速度信号,并对其进行预处理和归一化处理,从时程与频谱、加速度级和传递函数3个方面,分析低频振动在隧道结构、地表和建筑物内的传播特征。结果表明:隧道结构低频振动表现为整体振动,地表低频振动以竖向为主,而建筑物内的低频振动以水平方向为主;地表竖向低频振动随着距轨道水平距离的增加而衰减较快,水平低频振动在距轨道0~40 m范围内出现放大,40 m之外衰减较缓;建筑物内的水平低频振动,在10 Hz以下随着楼层的升高而增大,而在10~16 Hz时随着楼层的升高而减小;隧道基底到地表的竖向传递函数值随着距轨道水平距离的增加而逐渐减小,但随频率变化不大,在5~16 Hz范围内的传递函数值为0~0.5。
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| 关 键 词： | 地下铁道 低频振动 环境振动 试验研究 传播特征 加速度级 传递函数 |
Experimental Study on the Transmission Characteristics of Low-Frequency Vibrations Induced by Metro Operation |
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| DING Deyun,LIU Weining,LI Kefei,WANG Wenbin,MA Meng.Experimental Study on the Transmission Characteristics of Low-Frequency Vibrations Induced by Metro Operation[J].China Railway Science,2011,32(2). |
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| Authors: | DING Deyun LIU Weining LI Kefei WANG Wenbin MA Meng |
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| Institution: | DING Deyun1,2,LIU Weining1,LI Kefei1,WANG Wenbin1,MA Meng1(1.School of Civil Engineering,Beijing Jiaotong University,Beijing100044,China,2.Beijing Urban Engineering Design and Research Institute Co.,Ltd,Beijing100037,China) |
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| Abstract: | Environmental vibrations induced by metro operation have been paid more and more attention,especially the low-frequency(<20 Hz) vibrations.Low-frequency vibration tests in the laboratory are carried out to obtain the time history of accelerations in the tunnel structure,on the ground and in the surrounding building due to harmonic loads with the discrete frequency range between 5 and 16 Hz.By means of preprocessing and normalizing of the time history of accelerations,the transmission characteristics of low-... |
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| Keywords: | Metro Low-frequency vibration Environmental vibration Experimental study Transmission characteristics Acceleration level Transfer function |
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