铜陵公铁两用长江大桥船撞引起列车脱轨分析

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Abstract Research purposes:Precise prediction for mechanical behavior of the bridge under ship collision force is important to assess the analysis of train derailment after hitting the pier. This paper focuses on the Tongling Yangtze River Bridge Combined Road with Railway for ship collision simulation, uses the nonlinear finite element software of ANSYS / LS-DYNA to simulate the ship's bow section of 10 000 t and 5 000 t class hitting bridge tower column at front and axle to 20° of side in highest navigable water level, conventional navigable water level and the minimum navigable water level. Curves of collision force-period at different working conditions are summarized. On this basis, when the impact load affects as input loads, the displacement and acceleration response can be used by finite element analysis under the collision and study the dynamic response of the bridge caused by a train derailment risk.Research conclusions:(1) The impact force of the bridge is largest when a laden ship is hitting the pier at the highest navigable water level. In the most unfavorable condition, the collision have lardge impact on bridge structure and derailment risk of trains. (2) The transverse acceleration of the girder on the top of 2^# pier can reach to 0.922 m/s², but it does not exceed acceleration excitation limit (1 m/s²) when 3^# piers are hitted by the 10 000 t ship at the peak load of collision, so the probability of train derailment is minimal. (3) Based on the probability formula of the derailment by simplifying risk criteria, the derailment probability of train is 9×10^-5~1.5×10^-4 during the ship-bridge collision. (4) The research results can provide the reference for train traffic safety on railway bridge caused by ship collisions.

Key words： ship-bridge collision dynamic response train derailment risk probability

Received: 26 January 2014

PACS:

U442.59

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	Articles by authors
	FANG Hai
	SUN Hui-ming
	LIU Wei-qing
	MAO Yi-feng
	ZHANG Qiang

Cite this article:

FANG Hai,SUN Hui-ming,LIU Wei-qing, et al. Analysis of Train Derailment after Hitting the Pier of Tongling Yangtze River Bridge Combined Road with Railway[J]. 铁道工程, 2014, 31(9): 65-70.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2014/V31/I9/65

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