Analysis on the Local Damage of A Steel Box Girder under Internal Blast Loading of Vehicle Bomb

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (7) : 222-227.

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.

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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.

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bridge engineering / steel box girder / vehicle bomb / numerical simulation / damage effect.

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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[J]. Journal of Vibration and Shock, 2015, 34(7): 222-227

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