【摘要】 建立了钢筋混凝土结构有限元内部爆炸模型，并与试验数据进行了对比分析。在此基础上，开展了两层三跨的框架结构考虑不同爆炸当量及爆源位置的数值仿真分析，提出了构件-楼层-整体结构之间的毁伤关联关系，建立了通过构件和楼层的重要性来评估整体结构毁伤程度的方法。考虑爆源不确定性分布的情况，开展了板、梁、柱及整体结构的爆炸易损性分析。结果表明：爆源位于房间内任意位置时，板的毁伤概率最大，梁次之，柱最低；板的中度毁伤和重度毁伤的易损性值均比梁和柱要大，但柱的中度毁伤易损性值要大于梁的重度毁伤；考虑爆源位置的不确定性时，第一层构件较第二层构件更易损坏；对于整体框架结构，在27.8 kg当量时，轻度毁伤与中度毁伤易损性差距最大，差值达31%;在75 kg当量时，轻度毁伤和中度毁伤差值在5%内；在57.7 kg当量时，中度毁伤与重度毁伤易损性差距最大，差值达62%。更多还原

【Abstract】 A finite element internal explosion model of reinforced concrete structure was established and a comparative analysis with experimental data was conducted. On this basis, numerical simulation analysis was carried out on a two-story three-span frame structure considering different explosion yields and blast source positions. The damage correlation relationship among components, floors and the overall structure was proposed, and a method for evaluating the damage degree of the overall structure through the importance of components and floors was established. Considering the uncertainty distribution of the blast source, the blast vulnerability analysis of slabs, beams, columns and the overall structure was carried out. The results shows that when the blast source is located at any position within the room, the damage probability of slabs is the highest, followed by beams, and columns have the lowest probability. The vulnerability values of moderate and severe damage of slabs are both larger than those of beams and columns, but the vulnerability value of moderate damage of columns is greater than that of severe damage of beams. When considering the uncertainty of the blast source position, the components of the first floor are more prone to damage than those of the second floor. For the overall frame structure, at a yield of 27.8 kg, the difference between the vulnerability of light damage and moderate damage is the largest, reaching 31%. As the yield increases, at a yield of 75 kg, the difference between light damage and moderate damage is within 5%. At a yield of 57.7 kg, the difference between moderate damage and severe damage is the largest, reaching 62%.更多还原