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Running safety assessment of trains moving over bridges subjected to moderate earthquakes

机译：遭受中度地震过桥的列车的运行安全评估

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摘要

A study about the running safety of trains moving over bridges subjected to earthquakes is presented. The study focuses on moderate earthquakes with relatively small return periods and high probability of occurrence. The analyses are performed using a nonlinear train-bridge interaction method proposed by the authors, being the running safety evaluated with safety criteria existent in the literature. The influence on the train running safety of the seismic intensity levels, train running speed, and track quality is evaluated. Because no significant nonlinearity is likely to be exhibited in the columns for moderate levels of seismicity, the analyses are performed in the elastic domain. However, the reduction in the columns stiffness due to cracking is accounted, and a methodology to compute their effective stiffness is proposed. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：提出了列车在地震中越过桥梁的行驶安全性的研究。该研究的重点是中等地震，其返回期相对较短，发生的可能性较高。使用作者提出的非线性火车-桥梁相互作用方法进行分析，这是根据文献中存在的安全标准对行驶安全性进行评估的。评估了地震烈度水平，列车运行速度和轨道质量对列车运行安全的影响。由于对于中等程度的地震活动，列中可能不会表现出明显的非线性，因此在弹性域中进行分析。但是，考虑到了由于开裂而导致的柱刚度降低，并提出了一种计算其有效刚度的方法。版权所有（c）2015 John Wiley＆Sons，Ltd.

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