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近年来,对多层建筑物的连续倒塌分析进行了广泛的研究。然而,大多数的研究是基于突然移除柱的构件拆除法,忽略了爆炸荷载作用于结构的持续时间。提出一个可直接模拟爆炸荷载的三维数值模型来研究爆炸荷载下一座20层建筑物的实际性能。在12层引爆一个15kg的炸药包,从而详细研究结构相应的动力响应。对爆炸荷载下建筑物的鲁棒性进行评估。将所提出的方法与构件拆除法相比较发现,受作用于板的上下压力的影响,直接爆炸模拟方法下柱所受的力要小于构件拆除法所受的力,因此也建议使用这种方法来提高建筑物的鲁棒性。
In recent years, continuous collapse analysis of multi-storey buildings has been extensively studied. However, most of the research is based on the sudden removal of the column member dismantling method, ignoring the duration of the explosive load acting on the structure. A three-dimensional numerical model that directly simulates the explosion load is proposed to study the actual performance of a 20-storey building under blast load. Detonate a 15kg explosive pack on the 12th floor to study in detail the corresponding dynamic response of the structure. Evaluate the robustness of buildings under blast loads. Comparing the proposed method with the method of component dismantling, it is found that under the influence of the upper and lower pressure acting on the plate, the force exerted on the column by the direct explosion simulation method is less than the force exerted by the component dismantling method. Therefore, it is also suggested to use this method Improve the building’s robustness.