| 崔铁军,马云东.超高层建筑受大型高速飞行物撞击所致非连续性坍塌模拟与研究[J].计算力学学报,2016,33(1):66~72 |
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| 超高层建筑受大型高速飞行物撞击所致非连续性坍塌模拟与研究 |
| Numerical simulation for the impact of induced discontinuity collapse of high-rise buildings with large high-speed flying object |
| 投稿时间：2014-10-20 修订日期：2014-12-20 |
| DOI：10.7511/jslx201601011 |
| 中文关键词: 超高层建筑 大型高速飞行物 撞击 非连续性坍塌 |
| 英文关键词:high-rise buildings large high-speed object impact discontinuity collapse |
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| 中文摘要: |
| 为了解大型高速飞行物撞击超高层建筑后,建筑物塌落过程及其特征,使用基于颗粒流的PFC3D作为平台对坍塌过程进行模拟。所构建的超高层建筑为核心筒-框架结构,飞行物由较大的三个颗粒组成,其撞击速度为720 km/h,撞击高度为建筑侧面250 m和100 m。研究了撞击物进入层间运动的特征,及在两种高度撞击后的坍塌过程。模拟结果表明,飞行物非直接撞击核心筒时建筑不会发生整体破坏,核心筒的受撞破坏是建筑坍塌破坏的关键。建筑高处受撞击后坍塌可分为两个阶段,其现象和原因各不相同。指出了建筑高处和低处受撞坍塌过程的三点不同。最后分析了撞击塌落后的地面影响范围及特征。 |
| 英文摘要: |
| To understand the process of discontinuity collapse of high-rise buildings and its characteristics, induced by the impact of large high-speed object, the process of collapse is simulated based on PFC3D as a platform.The high-rise building of the frame-core tube is considered model.The object is composed of three particles, the impact speed of 720 km/h, height of 250 m and 100 m building side.The characteristics of the movement of the object into the interlayer are studied, and the collapse of the process with two kinds of impacted high.The simulation results show that the overall destruction of building would not happen when the object not directly impact the core tube, the core tube damage is the key to building collapse.The collapse impact of building heights can be divided into two stages; their phenomenon and reason are not identical.The three differences in the process of collapse between building heights and building lower are put forward.In the final, the ground influences the scope and characteristics after collapse are analyzed. |
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