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Case Studies of Bridge Failure due to Scour and Prevention of Future Failures

机译:冲刷导致桥梁破坏的案例研究和预防未来的失败

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Bridge failures over water are likely due to scour, often during floods and peak flow events which are becoming more common with climate change. ALL bridge scour failures are produced by large-scale scouring vortices formed at piers and abutments that bring higher velocity water down to erode the river bed. The purpose of this paper is to show that scouring-vortex-preventinq designs would have prevented ALL of the bridge scour failures and will prevent future failures at all flow speeds. Tests and computational fluid dynamic studies for a large variety of pier and abutment cases show that no scouring vortices are produced. Other advantages of these designs are: much lower present value of all costs, lower river levels and flow blockage, lower possibility for debris and ice buildup, and greater protection of piers and abutments against impact loads.
机译:水上桥梁的破坏很可能是由于冲刷造成的,通常是在洪水和洪峰流量事件期间,这种情况在气候变化中变得越来越普遍。所有桥梁冲刷破坏都是由码头和桥台上形成的大规模冲刷涡流造成的,这些冲刷涡流使较高速度的水冲向下侵蚀河床。本文的目的是表明冲刷-涡流预防设计将防止所有桥梁冲刷故障,并防止在所有流速下的未来故障。对各种墩台和基台的测试和计算流体动力学研究表明,没有产生冲刷涡流。这些设计的其他优点是:所有成本的现值大大降低,河流水位和水流阻塞更低,碎屑和冰块的可能性更低,并且墩台和桥台能够更好地抵御冲击载荷。

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