海南大厦基于大震弹塑性时程分析的抗震优化设计

Seismic optimum design based on elastic-plastic time-history analysis under rare earthquake of Hainan Skyscraper

海南大厦主楼高198.6m,采用带加强层的混合框架-核心筒结构体系。基于初始设计方案在选定的地震波下的大震弹塑性时程分析结果中出现的结构层间位移角超限、部分墙体受压损伤严重等问题,进行了四次有针对性的结构方案调整,最终使得结构在较为经济的情况下达到"大震不倒"的设防目标。由此可以看出,大震弹塑性时程分析方法能够指导设计人员对结构进行抗震优化设计。

Composite frame-core tube structure with outrigger and belt members is adopted in Hainan Skyscraper with the hight 198.6 meters.Based on the elastic-plastic time-history analysis for preliminary design scheme under chosen earthquake waves,several problems such as inter-story displacement angle exceeding limits of the code,part of walls injured concentrated and seriously and other issues were discovered.Four targeted structural adjustments have been conducted for the preliminary design scheme.Eventually,the seismic precautionary target of " no collapse under strong earthquake" can be achieved economically.Therefore,elastic-plastic time-history analysis can help designers to adjust and optimize structures.