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| Prediction of Vibration Response of Neighboring Constructions Based on Excitation of a City Metro |
| ZHENG Guo - chen1，QI Ai2 |
| (1. Fujian Jiangxia University，Fuzhou，Fujian 350108，China;2. Fuzhou University，Fuzhou，Fujian 350108，China) |
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Abstract Abstract ： Research purposes ： The metro is under construction in a city，in order to get credible prediction accuracy for
vibration response of neighboring constructions with this city metro，it is necessary to develop systematic research on
environmental vibration along this city metro with comparatively special geological condition. Accordingly，two subsystem model，the vehicle - track coupled model of vertical vibration and the tunnel - soil - construction models of 3DFEM are
established base on third kind of soft soil site of this city. Vibration responses of neighboring constructions are predicted
reference to the parameters of this city metro.
Research conclusions:( 1 ) Vibration responses of neighboring constructions mainly reflect structural self - vibration，
while there are rebound zones of middle - high frequency in the low levels of the constructions. (2) Train speed and single - double track have significant effects on peak acceleration，but have no significant effect on the vibration shape of the constructions. ( 3 ) The horizontal distances from multistoried construction to the centerline of the two tunnels is within 5 m，middle – high rise and high rise constructions are within 10 m，or range from 30 m to 40 m in vibration amplification zone， or the metro train speed is over 60 km/h，the floor accelerations of constructions may surpass vibration limit of related specification; so further vibration control is required to apply. (4) The relevant research results can provide a theoretical and technical support for design, construction and vibration control of metro environmental system on this city or geological condition similarities.
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Received: 11 July 2016
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2017, Vol. 34 
