基于流固耦合的钢筋混凝土板抗爆性的数值模拟研究

Numerical Simulation Study on Explosion Resistance of Reinforced Con-crete Slabs Based on Fluid Solid Coupling

研究基于流固耦合算法并结合适当的本构模型和失效算法,围绕不同厚度的钢筋混凝土板在不同质量TNT的爆炸作用下的动态响应,针对爆炸实验的高危险性,通过数值模拟的方法,主要探索了钢筋混凝土板在爆炸载荷下板厚对于其抗爆性能的影响,并且为了验证数值模型和材料参数,对数值模拟进行了验证,将损伤结果与已有的爆炸实验现象对比,结果很好地反映了TNT爆炸作用下钢筋混凝土板的损伤程度。试验结果表明:随着板厚的增加,钢筋混凝土板对于同等炸药量的抗爆性也随之加强,而当板厚大于80 mm时,板的抗爆性能大大增强。且比起迎爆面,板的背爆面会受到更严重的损伤。

Based on the fluid structure coupling algorithm and combined with appropriate constitutive models and failure algorithms, this study focuses on the dynamic response of rein-forced concrete slabs with different thicknesses under the explosion action of different mass TNT. In response to the high risk of explosion experiments, numerical simulation methods are used to ex-plore the impact of plate thickness on the anti explosion performance of reinforced concrete slabs under explosion loads. In order to verify the numerical model and material parameters, the nu-merical simulation was validated, and the damage results were compared with existing explosion experimental phenomena, which well reflected the degree of damage to reinforced concrete slabs under TNT explosion. The experimental results show that as the thickness of the plate increases, the anti explosion performance of the reinforced concrete plate for the same explosive amount also increases. When the plate thickness is greater than 80 mm, the anti explosion performance of the plate is greatly enhanced. Moreover, compared to the front explosive surface, the back explosive surface of the board will be more severely damaged.