Reduction of traffic-induced vibration of two-girder steel bridge seated on elastomeric bearings
Reduction of traffic-induced vibration of two-girder steel bridge seated on elastomeric bearings
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DOI：
10.1016/j.engstruct.2004.08.002
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发表时间：
2004-12
影响因子：
5.5
通讯作者：
Chul‐Woo Kim;M. Kawatani;W. Hwang
中科院分区：
文献类型：
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作者：
Chul‐Woo Kim;M. Kawatani;W. Hwang
针对双梁钢桥的伸缩缝，提出了加强端横梁和消除伸缩缝凸起的方法，以减小交通引起的振动，提高伸缩缝附近桥面阻力。通过三维交通诱导动力分析，研究了减震效应。研究表明，采用弹性支座的桥梁的交通加速度响应和动力反作用力大于采用钢销支座的桥梁。结果表明，无论支座类型如何，加强端横梁都可以减少交通引起的振动，并且消除凸起是降低桥梁动力反力的最有效方法。特别是对于采用弹性支座的桥梁，伸缩缝附近凸起的维护不仅对提高伸缩缝的伸缩寿命，而且对提高桥梁的抗振性具有重要意义。
Reinforcing end-cross beam and removing bumps at expansion joints of bridges are proposed to reduce the traffic-induced vibration and to enhance the deck resistance near the expansion joint of a two-girder steel bridge with elastomeric bearings at each support. The reduction effect is investigated by means of a three-dimensional traffic-induced dynamic analysis. This study indicates that traffic-induced acceleration responses as well as dynamic reaction force of the bridge with the elastomeric bearings are greater than those of the bridge with steel pin bearings. It is observed that reinforcing the end-cross beam reduces traffic-induced vibrations regardless of bearing types, and also removing bumps is the most effective in reducing the dynamic reaction force of the bridges. Especially, for the bridge with elastomeric bearings, the maintenance of bumps near expansion joints is very important to improve not only expanding life span of the expansion joint but also the vibration serviceability of bridges.