地铁列车振动作用下近距离平行隧道的弹塑性动力响应白冰.pdf

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地铁列车振动作用下近距离平行隧道的弹塑性动力响应白冰.pdf

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30 1 Vol.30 No.1 2009 1 Rock and Soil Mechanics Jan. 2009 (2009) 01 0123 06 100044 - U 459.1 TU 435 A Elastoplastic dynamic responses of close parallel metro tunnels to vibration loading BAI Bing, LI Chun-feng (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China) Abstract: Two-dimensional elastoplastic dynamic responses of close parallel metro tunnels to vibration loading caused by passing metro trains are studied by using finite element method. The responses of soil-tunnel system such as vibration acceleration, axial load and bending moment etc. are analyzed for one-arrange train loading and two-arrange train loading. Calculation results show that the dynamic responses such as axial load and bending moment are obvious. The responses of the tunnel with passing metro trains are greater than another tunnel without passing metro train. When two-arrange trains are passing simultaneously, the dynamic responses are notably increased than the responses caused by one-arrange passing trains. Key words: metro train; vibration acceleration; metro tunnel; dynamic response 1 [1] - - [24]