某330m超高层塔楼结构设计与分析

Analysis of structural design of a 330m super high-rise building

超高层建筑整体稳定性分析、加强层设计及结构转换等是超高层结构设计的重点和难点。通过越秀·国际金融汇三期330m超高层塔楼T5设计与分析,提出了刚重比修正、伸臂桁架+环带桁架加强层及斜柱转换设计等设计、分析方法。当结构整体稳定性指标刚重比成为结构设计的控制指标时,有必要对刚重比的适用条件进行分析。通过力学公式的推导可知,规范关于刚重比的计算方法适用于刚度和质量分布沿竖向均匀的结构;根据公式推导结合屈曲因子计算的对比分析,提出了当结构主要构件从下到上逐步收进、质量主要集中在下部楼层时针对刚重比的修正方法,使结构设计更加合理经济。在高区结构收进部位相邻下两层,设置伸臂桁架+环带桁架加强层,有效解决了高区结构收进后刚度削弱的问题。收进后高区外框架柱与核心筒剪力墙之间采用斜柱过渡的方式,解决了高区个别外框柱与下层的连接过渡问题,避免了结构转换层的设置。

Super high-rise overall stability analysis, strengthening layer design and structural transfer are the key and difficult point for super high-rise building design. Through design and analysis of the third phase of the Yuexiu International Financial 330 m super high-rise tower T5, stiffness-weight ratio correction analysis method, story with outriggers + belt members design method and inclined column transferring design method were provided. When the stiffness-weight ratio is the control index of overall structural stability, it is necessary to analyze the application conditions of the stiffness-weight ratio. From the derivation of the mechanical formula, the stiffness-weight ratio calculation method of specification is suitable for the structure with uniform distribution of stiffness and mass along the vertical. Based on the formula derivation and the comparative analysis of buckling factor calculation, when the main components of the structure are gradually retracted from bottom to top and the mass is concentrated in the lower floor, the correction method for the stiffness-weight ratio was proposed, which makes the structure design more reasonable and economical. In the lower two story of the high zone structure, the outriggers + belt members were set, the problem of stiffness weakening due to the the high zone structure changes was effectively solved. The inclined column transition is adopted between the outer frame column in the high zone and the shear wall of the corewall, which solves the connection transition problem between the individual outer frame column in the high zone and the lower story, and avoids the setting of the structural transfer story.