Load-carrying capacity of steel girder damaged by collision
Load-carrying capacity of steel girder damaged by collision
复制标题
碰撞破坏钢梁的承载能力
DOI：
10.1002/cepa.481
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yukito Tanaka
中科院分区：
文献类型：
--
作者：
Eiki Yamaguchi;Hiroyuki Tsuji;Yukito Tanaka
在高速公路上行驶的卡车与桥上的主梁相撞的事时有发生。为了保证桥梁上的交通安全，必须评估碰撞损伤对桥梁力学性能的影响。然而，这并不总是一件容易的任务，因为变形梁的机械能力还没有得到太多的研究。本文作者之一曾参与过一座受碰撞损坏的钢梁桥的安全评估。这座桥由两个钢主梁组成，其中一个看起来严重受损：腹板向外变形;一些横向加劲肋屈曲;一些其他加劲肋与腹板分离;一些横向支柱和腹板之间的螺栓连接断裂。利用实际损伤信息，通过有限元分析估算了碰撞载荷，再现了主梁的变形。然后研究了无损伤主梁、碰撞损伤主梁和损伤较大主梁的承载能力。在此基础上，讨论了碰撞损伤对结构承载力的影响。
It happens sometimes that a truck running on a highway collides with the main girder of a bridge over the highway. The influence of the damage due to collision on the mechanical behavior of the bridge has to be evaluated for the safety of traffic on the bridge. Yet it is not always an easy task, since the mechanical capacity of a deformed girder has not been studied much. One of the authors has been involved in the safety evaluation of a steel girder bridge damaged by collision. The bridge consisted of two steel main‐girders and one of them looked badly damaged: the web was deformed outwardly; some transverse stiffeners were buckled; some other stiffeners were separated from the web; and bolted connections between some lateral struts and the web were broken. Making use of the information on the actual damage, the collision load is estimated by the finite element analysis and the deformation of the main girder is reproduced. The load‐carrying capacities of the main girder without damage, the main girder damaged by collision, the main girder with larger damage are then studied. Based on the results, the influence of the collision damage on the load‐carrying capacity is discussed.