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桥墩防车辆撞击研究综述

, PP. 78-86

Keywords: 桥梁工程,防撞设计,综述,桥墩,车辆,撞击

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Abstract:

由于高速公路里程、机动车数量及其运载能力的持续增加,作为交通运输枢纽的桥梁,正面临着一种越来越严重的威胁,即车辆对桥墩的撞击。目前中、美、英等国的设计规范均对桥墩防撞设计作出了相关规定,然而分析发现各国规范仍大都采用简单的静力设计法,没有考虑桥墩刚度、延性等参数对撞击力的影响;一些规范的理论来源非常含糊,而另一些则只是简单地参考别国规范,其有效性值得怀疑。我国规范未对桥墩防车辆撞击设计的具体条件作出明确规定,设计人员须自行判断该桥墩是否需要考虑车辆撞击力,这种消极的规定往往造成实际工程中对车辆撞击作用的忽视。有鉴于此,从桥墩防护结构和桥墩自身结构两个方面对桥墩防车辆撞击研究进行了评述,指出了目前存在的主要问题并提出了相应的建议。

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