您现在的位置:建筑结构>> 期 刊>> 2018年>> 第03期>>正文内容
宁波新世界广场5号地块稀疏外框柱超高层塔楼结构设计
王文渊,赵兴国,张勇波,王亚军,王海,王若南,吴汉福,张同亿
摘 要

(中国中元国际工程有限公司, 北京 100089)

[摘要]宁波新世界广场5号地块超高层建筑采用极少见的单边3根外框架柱结构形式,造成外框刚度相对较弱,难以形成有效二道防线;过大的角部悬挑也给设计带来了一定的挑战。经多方案比选,主体结构采用钢管混凝土框架柱+钢梁+两道腰桁架+钢筋混凝土核心筒的结构形式。针对角部大悬挑双向布置悬挑梁,并利用时程分析法考虑竖向地震作用以保证设计的安全性。此外还存在因外框柱布置稀疏导致的柱梁线刚度比差别过大的问题。经系统研究分析,外框柱一阶屈曲模态主要为沿周向的侧移屈曲;框架柱计算长度系数普遍大于1-5(跃层、加强层及小层高等非常规楼层除外),与按规范给出的无侧移计算长度系数的设计结果相比,柱的稳定承载力变化范围在5%以内。

[关键词]超高层建筑; 混合结构; 加强层; 计算长度系数

中图分类号:TU398-7, TU318, TU973文献标识码:A文章编号:1002-848X(2018)03-0001-06

 

Structural design of super high-rise tower with sparse outer frame column on Ningbo New World Plaza 5th Plot

Wang Wenyuan, Zhao Xingguo, Zhang Yongbo, Wang Yajun, Wang Hai, Wang Ruonan,Wu Hanfu, Zhang Tongyi

(China IPPR International Engineering Co.,  Ltd.,  Beijing 100089, China)

Abstract:The super high-rise tower on Ningbo New World Plaza 5th Plot adopts a rare structural system with 3 sparse frame columns arranged on one side, which lead to relative weak lateral stiffness of out frame, and it is difficult to form an effective secondary defense line to earthquake. Too large cantilever of the corner part is another challenge for the safety structural design. Upon a comparison of a couple of structural scheme options, a hybrid structural system of concrete-filled steel tubular frame column + steel beam + two belt trusses + reinforced concrete corewall was employed for the main structure. Two-way cantilever beams were arranged at the corner part and vertical earthquake was considered for safety structural design by means of time-history analysis method. The sparse outer frame column layout resulted in too large difference of linear stiffness ratio of column and beam. A systematic analysis was carried out to find the first buckling modes of the outer frame columns mainly feature the circumferential lateral buckling. Calculation length coefficient of frame column is generally greater than 1-5 (except the unconventional floors including the jump-layer floor, strengthening story and floors of story with small layer height). Compared with the design results of the non-sway calculation length coefficient from the code, the variation range of the stability capacity of the column is less than 5%.

Keywords:super high-rise building; hybrid structure; strengthening story; calculation length coefficient

 

作者简介:王文渊,博士,教授级高级工程师,一级注册结构工程师,Email:wangwenyuan@ippr.net。

下载地址

    你还没注册?或者没有登录?这篇论文要求至少是本站的注册会员才能阅读!

    如果你还没注册,请赶紧点此注册吧!

    如果你已经注册但还没登录,请赶紧点此登录吧!