Seismic response of a monorail bridge incorporating train-bridge interaction
Seismic response of a monorail bridge incorporating train-bridge interaction
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DOI：
10.12989/sem.2007.26.2.111
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发表时间：
2007-05
影响因子：
2.2
通讯作者：
Chul‐Woo Kim;M. Kawatani;Chang Hun Lee;N. Nishimura
中科院分区：
文献类型：
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作者：
Chul‐Woo Kim;M. Kawatani;Chang Hun Lee;N. Nishimura
采用三维交通诱发振动分析方法，研究了高概率地震动作用下跨座式单轨桥梁的动力响应，阐明了列车动力系统对单轨桥梁地震反应的影响。假设单轨列车中的一节车厢有15dfs模型。通过与现场试验数据的对比，验证了所建立的单轨列车-桥梁相互作用系统运动方程的有效性。将地面运动引起的惯性效应与单轨列车-桥梁相互作用系统相结合，研究了列车行驶下单轨桥梁的地震反应。一个有趣的结果是，单轨桥梁上的列车动力系统在地震中可以起到阻尼作用。数值结果的观察还表明，单轨列车动力系统的阻尼效应随列车速度的增加而减小。
Dynamic responses of the bridge for a straddle-type monorail subjected to the ground motion of high probability to occur are investigated by means of a three-dimensional traffic-induced vibration analysis to clarify the effect of a train`s dynamic system on seismic responses of a monorail bridge. A 15DOFs model is assumed for a car in the monorail train. The validity of developed equations of motion for a monorail train-bridge interaction system is verified by comparison with the field-test data. The inertia effect due to a ground motion is combined with the monorail train-bridge interaction system to investigate the seismic response of the monorail bridge under a moving train. An interesting result is that the dynamic system of the train on monorail bridges can act as a damper during earthquakes. The observation of numerical results also points out that the damper effect due to the dynamic system of the monorail train tends to decrease with increasing speed of the train.