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
1.School of Science, North University of China, Taiyuan 030051, China;
2.School of Chemical and Environment Engineering, North University of China, Taiyuan 030051, China
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.
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. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(24): 229-236.
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