中文摘要：

为了解含有多核心筒的复杂高层建筑结构在地震荷载作用下坍塌过程及特征,基于颗粒流构建建筑模型并实施地震模拟。模拟建筑结构为中空-四核心筒-框架结构,施加地震荷载为正弦波,其峰值加速度分别为a=0.4 g、0.3 g、0.2 g且持续时间为9 s。模拟上述3种峰值加速度时的建筑破坏坍塌过程,模拟表明：加速度较大（a=0.4 g）时建筑坍塌特点是建筑向左倾倒,建筑中4个核心筒瓦解。该现象的必要条件是核心筒的非同步破坏,充分条件是核心筒底部破坏。加速度较小（a=0.3 g、a=0.2 g）时建筑坍塌特点为建筑显整体性的坐塌,震动未使建筑核心筒瓦解。在建筑整体坐塌情况下,建筑倾倒时间受震动影响较小;而坐塌经历时间受震动影响较大。

英文摘要：

earthquake earthquake sine wave, of building In order to understand the collapse process and characteristics of complex high-rise buildings under load, with core tube structure, the building construction are model based on the particle flow and the load are simulated. The simulation structure is hollow-four core-frame structure, the earthquake load is the peak acceleration is respectively a = 0.4 g, 0.3 g and 0.2 g and duration for the 9 s. The process damage collapse are simulated considering the above three peak acceleration. Simulation shows when the vibration acceleration a = 0.4 g, the building collapse is characterized by dumping to the left, building four cores solution. The necessary conditions for the phenomenon is the core of asynchronous damage, sufficient conditions are at the bottom of the core tube damage. When acceleration is small （a =0.3 g, a =0.2 g） , the building collapsed characteristics is for the building of integrity sitting collapse, not make building cores solution. In building integrity sitting collapse, building dumping time is less affected by vibration, and sitting collapse time are greatly influenced by vibration.