Analysis on the Local Damage of A Steel Box Girder under Internal Blast Loading of Vehicle Bomb
The response process, failure modes and damage parameters of a double deck steel box girder subjected to internal blast loading of vehicle bombs (TNT equivalent 200kg~1500kg) were simulated with the Fluid-Solid coupling arithmetic method of ALE Multi-material formulations, in which three typical blast locations on the lower deck were considered. The results show that: the failure modes and damage parameters have a clear correlation with the TNT weight and blast location, and the explosion locations have strong effects on the damage degree of the steel truss. Stiffening ribs can restrict the crack in its vertical direction. The damage effects have been intensified by the restriction of the box-shaped girder. Some useful measurements are also proposed which can help engineers for bridge designing and protection consideration against possible explosion events.
1. College of Science, National University of Defense Technology, Changsha, 410073
2. College of Basic Education, National University of Defense Technology, Changsha, 410072
3. HydroChina Zhongnan Engineering Corporation, Changsha, 410014
Abstract：The response process, failure modes and damage parameters of a double deck steel box girder subjected to internal blast loading of vehicle bombs (TNT equivalent 200kg~1500kg) were simulated with the Fluid-Solid coupling arithmetic method of ALE Multi-material formulations, in which three typical blast locations on the lower deck were considered. The results show that: the failure modes and damage parameters have a clear correlation with the TNT weight and blast location, and the explosion locations have strong effects on the damage degree of the steel truss. Stiffening ribs can restrict the crack in its vertical direction. The damage effects have been intensified by the restriction of the box-shaped girder. Some useful measurements are also proposed which can help engineers for bridge designing and protection consideration against possible explosion events.
姚术健1,蒋志刚2，卢芳云1，张舵1，赵楠3. 汽车炸弹钢箱梁内部爆炸局部破坏效应分析[J]. 振动与冲击, 2015, 34(7): 222-227.
Yao Shujian1，Jiang Zhigang2，Lu Fangyun1，Zhang Duo1. Analysis on the Local Damage of A Steel Box Girder under Internal Blast Loading of Vehicle Bomb. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(7): 222-227.
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