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针对某地下军火库的钢筋混凝土墙以及地面的防爆墙,采用AUTODYN软件,结合RHT模型,模拟了爆炸荷载作用下两者的动态损伤响应。首先根据军火库的炸药存放量,采用数值模拟方法计算得出不同部位的爆炸荷载。针对钢筋混凝土隔墙,采用二维模型计算临近库房意外爆炸通过沙土传播引起的压力时程曲线;针对地面的钢筋混凝土防爆墙,采用三维有限元模拟爆炸波在库房内以及出口的传递,从而计算作用于防爆墙的荷载。然后将相应的荷载分别作用于钢筋混凝土隔墙以及防爆墙,采用RHT混凝土模型,对两者的动态响应进行模拟。计算结果表明:针对可能的炸药存放量,一旦发生意外爆炸,不仅存放炸药的库房会出现严重破坏,而且破坏还会引起相邻库房钢筋混凝土隔墙的严重破坏,出现明显的塑性铰线,整个墙体产生巨大变形;而设置于地面的防爆墙则出现严重的整体坍塌。
Aimed at the reinforced concrete wall of an underground arsenal and the explosion proof wall on the ground, the dynamic damage response of the two under the action of explosion load was simulated by AUTODYN software combined with RHT model. First, according to the arsenal storage of explosives, using numerical simulation method to calculate the different parts of the explosion load. For the reinforced concrete wall, the two-dimensional model is used to calculate the pressure history curve of accidental explosion near the storehouse due to sand soil propagation. For the reinforced concrete explosion-proof wall of the ground, the three-dimensional finite element method is used to simulate the propagation of the explosion wave in the warehouse and the outlet, Load acting on Explosion Wall. Then the corresponding loads are applied to the reinforced concrete wall and explosion-proof wall respectively. The RHT concrete model is used to simulate the dynamic response of the two. The calculation results show that in the event of an accidental explosion, in the event of an accidental explosion, not only the warehouse storing explosives will be severely damaged, but also the destruction will cause serious damage to the reinforced concrete partition walls of adjacent warehouses with obvious plastic hinge lines. The wall has a huge deformation; while the explosion-proof wall set on the ground there is a serious overall collapse.