钢箱梁结构在爆炸冲击波作用下局部破坏影响因素试验研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (24) : 229-236.

论文

刘亚玲1，刘玉存2，耿少波1，王万月1，薛建英1，刘兰1

作者信息 +

An experimental study on the local damage and influence factors of a steel box girder under explosive shock wave

LIU Yaling1， LIU Yucun2， GENG Shaobo1， WANG Wanyue1， XUE Jianying1， LIU Lan1

Author information +

文章历史 +

摘要

选用工程中常见的单箱双室和单箱三室截面形式，按照相似理论设计制作了14个缩尺比例为1:10的钢箱梁试验模型，在一定的药量和爆炸距离下，通过改变钢箱梁试验模型的高度、顶板厚度、U肋的间距和厚度、横隔板及纵板的间距和厚度等结构参数，对其进行了近距离爆炸的破坏性试验。试验表明，超压值的大小与钢箱梁顶板的破坏状态有关；运用能量法可以很好的预测钢箱梁结构顶板的塑性变形值及顶板破损状态和破损的程度；破坏状态与破坏程度是一个多参数共同影响的综合结果，顶板厚度、U肋、横隔板间距等参数可以提高钢箱梁顶板的抗爆能力，尤其是U肋的约束作用尤为显著，破坏程度的降低幅度达到80%以上。

Abstract

Using a twin-cell box girder and three-cell box girder cross-sections that are commonly used in engineering, 14 steel box girder testing models were constructed at a 1∶10 scale, according to the similarity theory.While changing the structural parameters, such as the height of the girder, the thickness of the girder roof, the spacing and thickness of the U rib, and the spacing and thickness of the diaphragm plate, destructive tests on the close-range explosion of steel box girders were carried out with a given quantity of explosives and explosion distance.The results show that: the overpressure value is related to the failure state of the roof of the steel box girder; the energy method can predict the plastic deformation value of the steel box girder roof structure and the extent of damage to it; and that the damage state and extent of damage is a comprehensive multi-parameter result of mutual influences.The thickness of the roof, the spacing and thickness of the U rib, and the spacing and thickness of the diaphragm plate can improve the antiknock ability of the steel box girder roof.The U rib constraint is particularly important, as the degree of damage to the roof of the steel box girder can be reduced by more than 80% by increasing it.

导出引用

刘亚玲1，刘玉存2，耿少波1，王万月1，薛建英1，刘兰1. 钢箱梁结构在爆炸冲击波作用下局部破坏影响因素试验研究[J]. 振动与冲击, 2018, 37(24): 229-236

LIU Yaling1， LIU Yucun2， GENG Shaobo1， WANG Wanyue1， XUE Jianying1， LIU Lan1 . An experimental study on the local damage and influence factors of a steel box girder under explosive shock wave[J]. Journal of Vibration and Shock, 2018, 37(24): 229-236

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