为研究复杂结构高层建筑受到飞机撞击后的坍塌过程,使用颗粒流理论对该过程进行模拟,过程包括撞击、爆炸、火灾及建筑坍塌.引入了颗粒流相关模型,包括飞机撞击模型、爆炸模型及火灾模型.建筑模型高为216 m,中部空间较大并由4个核心筒组成的复杂结构.分别在建筑高程200 m和100 m处实施了撞击模拟.其结果显示:由于建筑结构的复杂性和撞击高度不同,导致撞击后建筑破坏过程差异明显,特别是坍塌原因、坍塌形式和坍塌时间差别较大. In order to study the collapse process of high-rise buildings with complex structure subjected to impact by aircraft, particle flow theory is used to simulate the process, including impact, explosion, fire and building collapse. Particle flow correlation models are introduced, including aircraft impact model, explosion model and Fire model. The building model is 216 m high with a large central part and consists of 4 core cylinders. Impact simulations were carried out at elevation 200 m and 100 m respectively. The results show that due to the complexity of the building structure Different from the impact height, the process of building damage caused by impact is obviously different, especially the cause of collapse, and the difference between collapse form and collapse time is larger.