气云爆炸下钢筋混凝土板毁伤的数值分析

Numerical Simulation on Damage Assessment of RC Slabs under Vapour Cloud Explosion

为了研究气云爆炸下钢筋混凝土板的毁伤评估,通过ANSYS有限元数值模拟方法,研究了钢筋混凝土板的在气云爆炸下的毁伤情况。采用超压-冲量毁伤准则,以剩余承载力为毁伤指标绘制了不同毁伤程度的P-I曲线,通过数学计算拟合了P'-I'-D毁伤曲面公式,并利用数值模拟验证该公式的正确性,将数值分析和公式计算得到的毁伤程度D的比较,在不同毁伤程度下D的误差最大为14.30%。因此,该公式可用于评定钢筋混凝土板在气云爆炸下的毁伤程度。

In order to study the damage assessment of RC slabs under vapour cloud explosion, the method of nu- merical simulation with ANSYS was applied. The P′-I′-D damage surface formula was established through P-I dia- gram by taking the residual bearing capacity as the damage index, and validating the formula by numerical simula- tion. Comparing the numerical analysis and formula calculation of damage degree D, the maximum error of D is 14. 30%. Therefore, the formula can be used to evaluate the damage degree of RC slabs under vapour cloud explosion.