超高层结构伸臂桁架安装时序分析与控制方法_王化杰
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第47卷第7期2014年7月
土木工程学报
CHINA CIVIL ENGINEERING JOURNAL
Vol.47Jul.No.72014
基金项目:国家“十二五”科技支撑项目(2012BAJ03B01),中国博士后
科学基金(2014M551253)
作者简介:王化杰,博士,讲师收稿日期:2013-
06-27超高层结构伸臂桁架安装时序分析与控制方法
王化杰
1,2
钱宏亮
1,2
范峰
1
支旭东
1
(1.哈尔滨工业大学,黑龙江哈尔滨150090;2.哈尔滨工业大学(威海),山东威海264209)
摘要:以深圳京基金融中心为原型,对Z 形和V 形两种典型伸臂桁架进行多种安装方案分析,研究单个伸臂桁架随施工进展的附加内力发展规律及其不同安装时序时的相互影响。结果表明,在任意确定的施工段内,不同连接方案下单个伸臂桁架附加极值应力发展规律基本不变,多个伸臂桁架的影响结果可由各自影响结果叠加得到,且安装时彼此之间相互影响很小。最终给出伸臂桁架连接时刻与最大附加应力关系曲线,
给出以附加应力为控制目标的合理安装时序分析控制方法,并通过算例验证方法的有效性。最后,通过京基金融中心伸臂桁架安装全过程监测,验证理论分析的可靠性,相关控制分析方法可用于同类超高层结构伸臂桁架合理连接时序的确定,指导施工过程。
关键词:京基金融中心;伸臂桁架;施工监测;安装时序;超高层;中图分类号:TU973.14
文献标识码:A
文章编号:1000-
131X (2014)07-0001-08Analysis and control method of optimum scheduling of outrigger-brace
installation for super high-rise buildings
Wang Huajie 1,
2
Qian Hongliang 1,
2
Fan Feng 1Zhi Xudong 1
(1.Harbin Institute of Technology ,Harbin 150090,China ;2.Harbin Institute of Technology at Weihai ,Weihai 264209,China )
Abstract :Different installation scheme for the Kingkey Financial Centre was analyzed to study the additional stress of two types of outrigger-braces.The additional stress developing rules with the construction progress of single outrigger-brace and the interaction of additional stress in different outrigger-braces with different installation schedule is studied.The analysis results show that additional stress developing rules of single outrigger-brace is same in any construction phrase even if it is installed in different schedule.The effect of other outriggers to some outrigger-brace could be obtained by adding the effect of every other outrigger-brace to the outrigger-brace ,and the influence between different outrigger-braces is very small.The curves of maximum additional stress versus connection time of the outrigger-brace are obtained.The optimum scheduling method of outrigger-brace installation with the additional stress as control objective is proposed and verified by a numerical example.The field monitoring of outrigger-brace construction of Kingkey Financial Centre was implemented.The numerical analysis results agree well with the monitoring results ,which proves the feasibility and the validity of the method.The proposed method can be used to guide the outrigger-brace installation of similar super high-rise buildings.
Keywords :Shenzhen Kingkey Financial Centre ;outrigger-brace ;construction monitoring ;scheduling and installation ;super high-rise building
E-mail :huajie_wang@hit.edu.cn
引言
近年来超高层结构在我国发展迅速,这些结构往
往采用框架核心筒混合体系,但是随着结构高度的增
加,框架核心筒结构体系存在侧向刚度不足及核心筒内力偏大的缺陷。这是因为尽管核心筒侧向刚度较大,但是对整个结构而言核心筒宽度较窄,且外框架和核心筒之间的距离通常较大,随着结构高度的增加,仅靠楼板和连梁难以保证外框架和核心筒的良好协同工作,外框架仅承担较小的水平剪力,结构水平荷载主要由核心筒承担,受力性能类似于悬臂柱,弯曲变形较大,水平变形增长过快,如图1(a )所示。因此,为了增大结构的侧向刚度,保证结构的整体性,往