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郑州银基中央广场结构设计
余小伍,冯向华,罗伟,马晖
摘 要

(奥雅纳工程顾问, 深圳 518048)

[摘要]郑州银基中央广场项目包含两栋塔楼和裙房,采用了不设置永久结构缝的大底盘多塔结构形式,属复杂超限高层结构。高塔采用框架-钢筋混凝土核心筒结构体系,结合塔楼高区酒店和中、低区办公功能对柱网的不同需求,利用高区的设备转换层进行了外框柱网的转换,角部采用了折梁转换;由于低塔核心筒的高宽比达到15-7,为加强整体抗侧刚度,采用了框架+端墙/楼面梁+核心筒的抗侧结构体系。针对与端墙相连楼面梁的受力特点,对其进行了刚度敏感性分析以模拟不同地震水准下的刚度退化影响。并制定了区别于一般耗能构件的性能目标,即大震作用下,允许较大比例的连梁严重破坏耗能,并对连梁采取了防跌落构造措施。另外,对塔楼的基础设计及考虑变刚度调平的布桩方法、中震作用下核心筒外墙的拉应力分析及处理措施进行了论述。

[关键词]超高层建筑; 永久结构缝; 折梁转换; 空间作用; 墙肢拉应力; 高宽比

中图分类号:TU318-2文献标识码:A文章编号:1002-848X(2017)14-0037-06

 

Structural design on Yinji Central Plaza in Zhengzhou

Yu Xiaowu, Feng Xianghua, Luo Wei, Ma Hui

(Arup, Shenzhen 518048, China)

Abstract:Yinji Central Plaza project in Zhengzhou consists of two tower buildings and one commercial podium, and it adopts the multi-tower structure with large chassis and without permanent structural joints. It is a complex out-of-code high-rise structure. Higher tower building adopts  structural system of  frame and reinforced concrete corewall. Considering different needs of hotels in higher zone and offices in middle and lower zones for the column grid, the equipment transition layer in higher zone is used to transfer external frame column grid, and folded beam transition is adopted in the corners; due to the high aspect ratio of corewall for low tower building is 15-7, the lateral resistant system is adopted including frame+end shear wall and floor beam+corewall, in order to strengthen the overall lateral stiffness. Considering the mechanical characteristics of floor beam connected with end shear wall, the stiffness sensitivity analysis was conducted to simulate influences of stiffness degradation under different earthquake levels. Performance objectives were developed different from general energy dissipation components: under the rare earthquake, a larger proportion of coupled beams were allowed to suffer from serious damage for energy dissipation. Construction measures were taken to prevent from dropping of coupled beam. In addition, the foundation design of the tower building and the variable stiffness leveling method for pile layout, the tensile stress analysis and treatment measures of the external shear wall of corewall under the fortification earthquake were discussed.

Keywords:super high-rise building; permanent structural joint; folded beam transition; spatial effect; tensile stress in wall; aspect ratio

 

作者简介:余小伍,硕士,一级注册结构工程师,Email:xiao-wu.yu@arup.com。

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