地铁振动对既有砌体结构影响的试验研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (12) : 11-16.

论文

地铁振动对既有砌体结构影响的试验研究

夏倩屈文俊商晓东

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Experimental Study of metro train-induced Vibrations and their influences on Existing masonry Building

ＸＩＡＱｉａｎ，ＱＵＷｅｎｊｕｎ，ＳＨＡＮＧＸｉａｏｄｏｎ

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摘要

以某两栋砌体结构为工程实例，对上海某线地铁振动进行了现场实测，分别从振级和1/3倍频程振动加速度级两方面研究了地铁对建筑物振动的影响规律。测试结果表明：对两栋5层砌体结构，楼板振动沿层高呈增大趋势，顶层的竖向振级比底层大2~4dB，水平向振级比底层大6~7 dB，昼间时段中高峰期的三向振级均大于非高峰期的振级，同时昼间时段振级均大于夜间时段振级；房间中央的楼板振动大于墙边和楼梯楼面的振动；地铁对建筑物的振动主要为10~25Hz低频振动。

Abstract

Based on two masonry structures，an situ experiment was carried out to study the vibration induced by the subway in Shanghai from two aspects as the vibration level and frequency. Preliminary conclusion were：Vibrations of the floors increase by height. The vibration acceleration level in the vertical direction of the top floor is 2~4dB larger than that of the ground floor and when it comes to the horizontal direction, the vibration acceleration level of the top floor is 6~7dB larger than that of the ground floor. The vibration levels in the three directions in traffic peak time are all larger than those in non peak time. The vibration level in daytime is larger than that at night. Vibration in the center of the floor is larger than that in the corner of the floor and that in the staircase. Vibration induced by subway is mainly in low frequency from 10Hz to 25Hz.

导出引用

夏倩屈文俊商晓东. 地铁振动对既有砌体结构影响的试验研究[J]. 振动与冲击, 2013, 32(12): 11-16

ＸＩＡＱｉａｎ;ＱＵＷｅｎｊｕｎ;ＳＨＡＮＧＸｉａｏｄｏｎ. Experimental Study of metro train-induced Vibrations and their influences on Existing masonry Building[J]. Journal of Vibration and Shock, 2013, 32(12): 11-16