带柱墙转换的某高层商住楼少墙框架结构分析设计

Structural Analysis and Design of Less-Wall Frame of a High-Rise Commercial and Residential Building with Column-Wall Conversion

以某超高层商住楼为例,结合YJK与MIDAS两种软件的多遇地震下的计算结果,分析其房屋总高度、层间位移角和扭转位移比、竖向结构构件局部转换等超限情况及采取的设计加强措施。分析结果表明:局部带柱墙转换的少墙框架结构体系适用于此类建筑,其弹性位移角限值可按底部倾覆力矩的占比插值取用,大跨悬挑区域的楼盖舒适度验算满足JGJ/T 441—2019《建筑楼盖结构振动舒适度技术标准》要求,构件设计时需考虑弹性时程分析结果来调整楼层地震作用,罕遇地震静力推覆所得的弹塑性层间位移角小于1/100,满足性能化设计要求。

A super high-rise commercial and residential building was taken as an example,combined with the calculation results of frequent earthquake using YJK and MIDAS software,the overrun situations in terms of total height,the ratio of inter-story drift angle to torsional inter-story drift,local conversion of vertical structural members,and the adopted strengthening measures were analyzed.The analysis results showed that:less-wall frame structure system with partial column-wall conversion was suitable for this kind of building,the elastic inter-story drift angle limits could be interpolated according to the proportion of the overturning moment at the bottom.The results of floor comfort check for the long-span cantilevering area could meet the requirements of Technical Standard for Human Comfort of the Floor Vibration(JGJ/T 441—2019).The results of elastic time-history analysis should be taken into account to adjust the floor seismic force in the design of components,the elastic-plastic inter-story drift angle obtained by static pushover under severe earthquakes was less than 1/100,which could meet the performance design requirements.