安全壳钢筋混凝土简支墙抗爆性能分析

Capacity of Reinforcement Concrete Wall in the Containment to Resist Blast Loading

核电站附近的常规弹药爆炸可能引起核电站主体结构的破坏.为了评估安全壳筒墙的抗爆性能,根据结构的抗力设计曲线,提出了一种判断简支墙抗爆能力的新方法,并以核电站中的钢筋混凝土墙为例,给出了简支墙所能承受的最大入射压力和爆炸的安全距离,当延性系数为3,墙厚和配筋率相同时,设计抗力提高一倍,简支墙不破坏的最小安全爆炸距离减少了12%;抗力和配筋率相同,600mm厚比450mm厚的简支墙不破坏的最小安全爆炸距离减少了3%.计算结果表明,设计抗力、墙体厚度和配筋率对简支墙可承受的最大超压值以及不破坏的最小安全爆炸距离有不同的影响.该方法和计算结果可用于核电站遭袭后安全性可否保障的初步判断.

The structure failure is caused under the blast wave produced by blasting of conventional arms near the station. In order to evaluate the capacity of reinforced concrete wall in the containment to resist blast loading, the paper puts forward a new method based on structure resistance function to judge the capacity to resist blasting and as an example analyze the capacity of the wall at simple support condition to resist blasting,obtain the results about maximum incident pressure and safe distance. When ductility factor is 3 and the wall has the same thick and reinforcement ratio,if resistance design value doubles,minimum safe distance reduces 12%; When the wall has same ductility and reinforcement ratio, 600 mm thick wall minimum safe distance reduces 3% over 450 mm thick wall.Numeration results indicate ductility factor,resisting design value, wall thickness and reinforcement ratio have different influence on minimum sasafe distance when the wall is damaged.The method and the analytical results can be used to roughly assess if the nuclear power station is safe after attacked by conventional arms.