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本文采用非线性程序PERFORM-3D进行某超高层结构弹塑性时程分析,塔楼1～40层为框架-核心筒结构和3层连体裙房,塔楼外围框架柱全部采用钢管混凝土柱,底部局部3层通高穿层柱,其中核心筒尺寸约为38.7m×13m,筒体外壁厚由底部700mm向上逐步收至500mm。根据结构的层间位移角、楼层剪力、构件耗能、钢材屈服和剪力墙损伤等计算结果,找出结构的薄弱位置,分析在罕遇地震下结构的抗震性能,为抗震设计提供依据。
In this paper, the non-linear program PERFORM-3D is used to analyze the elastic-plastic time-history of a super high-rise structure. The first to the 40th floors of the tower are the frame-core tube structure and the 3-storey one-piece podium. All the frame columns around the tower adopt CFST columns, The 3-story high through the pillars, of which the core tube size is about 38.7m × 13m, the outer cylinder wall thickness gradually increased from the bottom of 700mm to 500mm. According to the calculation results of the layer displacement angle, floor shear, component energy consumption, steel yielding and the damage of the shear wall, the weak position of the structure is found, and the seismic performance of the structure under rare earthquakes is analyzed to provide the basis for the seismic design .