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研究超高层建筑的地震倒塌模拟有很重要的现实意义。尽管在高烈度地震区巨型支撑框架-核心筒超高层建筑是高层结构体系中比较常见的一种,但却很少研究这种建筑在地震突发事件中的失效模式和倒塌机制。研究在中国高危地震带建造的巨型支撑框架-核心筒超高层建筑(H=550m)在最大0.9g(g为重力加速度)谱加速度下的倒塌行为。根据纤维梁模型和多层壳模型建立有限元模型。分析这种建筑的动态特性并进行地震倒塌模拟。最后,详细地探讨其在地震倒塌中的失效模式和机理。此研究可作为类似的超高层建筑抗倒塌设计的参考。
It is of great practical significance to study the earthquake collapse simulation of super high-rise buildings. Although the megafall support frame-core-tube super-tall building in a high-intensity earthquake area is the most common type of high-rise structural system, the failure mode and collapse mechanism of this kind of building in earthquake events are rarely studied. The collapsing behavior of a huge supporting frame-core tube super tall building (H = 550m) built at a high seismicity zone in China with a maximum acceleration of 0.9g (g) was studied. The finite element model is established according to the fiber beam model and multi-layer shell model. Analysis of the dynamic characteristics of this building and earthquake collapse simulation. Finally, it discusses in detail its failure mode and mechanism in earthquake collapse. This study can be used as a reference for anti-collapse design of similar super high-rise buildings.