高烈度地区钢筋混凝土框架-核心筒超高层结构设计及抗震性能分析

Structural Design and Seismic Performance Analysis of a super High-rise Office Building with RC Frame-Core Wall Structure System in High Seismic Density Region

对位于昆明市的1栋171.8 m超B级高度办公楼进行了结构设计,采用钢筋混凝土框架-核心筒结构体系,存在扭转不规则及跃层柱两项不规则项。通过核心筒剪力墙及框架梁布置优化调整,有效解决了墙肢受力不均的问题,避免少数墙肢在中、大震时受力集中并损坏严重。采用基于性能的抗震设计方法,进行了小震弹性计算、中震性能化验算、大震动力弹塑性时程等分析。根据分析结果,提出相应的抗震加强措施确保结构安全可行。

A high-rise office building located in Kunming ity is a RC frame-core wall structural system. The roof height is 171.8 meters which is out of codes. Optimized adjustment was applied to the core and frame,avoiding serious damage to the wall under fortification and rare earthquake. Performance-based aseismic design method was adopted,and series of calculation were included such as elastic calculation,performance checking under fortification earthquakes,and elasto-plastic time-history analysis under rare earthquakes. Analysis results helped to make pertinent aseismic strengthening measures to make the structure safe and feasible.