超高层混合结构施工阶段结构性能评估与控制
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摘要
考虑施工期间结构体系的时变性,引入施工阶段基于性能的结构设计(PBSD)方法评估与控制处于不同施工阶段的结构状态,解决了超高层建筑施工过程评估与控制的问题。分析了施工阶段结构体系在竖向荷载与侧向荷载作用下的设计准则,并以上海中心大厦超高层建筑工程为例,分析其在施工阶段的结构性能目标并进行结构性能评估。研究结果表明:基于结构性能目标对施工阶段的结构性能进行评估与控制是可行有效的;对于带伸臂桁架的超高层混合结构,伸臂桁架的合拢时间和位置是控制施工阶段结构性能的关键因素。
This paper addresses the structural performance assessment and control of super high-rise mixed structures during construction.The performance based structural design(PBSD) methodology was introduced for the performance assessment and control of super high-rise structures at different construction stages.The change of structural system along with the ongoing construction was considered.The critical issues in the PBSD of super high-rise buildings during construction were fully addressed.By considering both gravity loads and lateral loads,the design criteria for structural systems under construction stage were firstly discussed.The Shanghai Tower project was taken as an example in this paper to illustrate the proposed structural performance assessment during construction.It is shown that the proposed structural performance assessment method during construction phase is feasible and effective.It is also found that the arrangement of the lock-ins of outriggers for different construction stages is the key measure to control the performance of the mega frame outrigger core wall structures during construction.
This paper addresses the structural performance assessment and control of super high-rise mixed structures during construction.The performance based structural design(PBSD) methodology was introduced for the performance assessment and control of super high-rise structures at different construction stages.The change of structural system along with the ongoing construction was considered.The critical issues in the PBSD of super high-rise buildings during construction were fully addressed.By considering both gravity loads and lateral loads,the design criteria for structural systems under construction stage were firstly discussed.The Shanghai Tower project was taken as an example in this paper to illustrate the proposed structural performance assessment during construction.It is shown that the proposed structural performance assessment method during construction phase is feasible and effective.It is also found that the arrangement of the lock-ins of outriggers for different construction stages is the key measure to control the performance of the mega frame outrigger core wall structures during construction.
引文
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[3]李瑞礼,曹志远.结构工程施工分析的材料时变效应[J].同济大学学报,2003,31(8):926-930.(LIRuili,CAO Zhiyuan.Structural analysis consideringmaterial time-varying in construction[J].Journal ofTongji University,2003,31(8):926-930.(inChinese))
[4]Fintel M,Ghosh S K,Iyengar H.Column shortening intall buildings-prediction and compensation[M].Skokie,Illinois,USA:Portland Cement Association,1984.
[5]Park H S.Optimal compensation of differential columnshortening in high-rise buildings[J].The StructuralDesign of Tall and Special Buildings,2003,12(1):49-66.
[6]周绪红,黄湘湘,王毅红,等.钢框架-钢筋混凝土核心筒体系竖向变形差异的计算[J].建筑结构学报,2005,26(2):66-73.(ZHOU Xuhong,HUANGXiangxiang,WANG Yihong,et al.Calculation of thedifferent shortening of steel frame-reinforced concretecore-wall structure[J].Journal of Building Structures,2005,26(2):66-73.(in Chinese))
[7]高小旺,鲍蔼斌,地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):13-22.(GAO Xiaowang,BAO Aibin.Probabilistic model andits statistical parameters for seismic load[J].Earthquake Engineering and Engineering Vibration,1985,5(1):13-22.(in Chinese))
[8]王光远,于玲.抗地震结构三级设防的可靠性分析[J].哈尔滨建筑大学学报,2002,35(1):1-6.(WANG Guangyuan,YU Ling.Reliability analysis forthree levels of fortification of seismic structures[J].Journal of Harbin University of Civil Engineering andArchitecture,2002,35(1):1-6.(in Chinese))
[9]周锡元,曾德民,高晓安.估计不同服役期结构的抗震设防水准的简单方法[J].建筑结构,2002,32(1):37-40.(Zhou Xiyuan,Zeng Demin,GaoXiaoan.A simplified method for estimating design basicintensity of structures with different service period[J].Building Structure,2002,32(1):37-40.(inChinese))
[10]FEMA 356.Prestandard and commentary for the seismicrehabilitation of buildings[R].Washington DC:Federal Emergency Management Agency,2000.
[11]Comite Euro-international Du Beton.CEB-FIP modelcode[S].London:Thomas Telford Publishing,1993.
[12]陈载赋.结构力学简明手册[M].成都:四川科学技术出版社,1986:263.
[13]徐培福,肖从真.高层建筑混凝土结构的稳定设计[J].建筑结构,2001,31(8):69-72.(Xu Peifu,XiaoCongzhen.Stability design for the tall concretebuildings[J].Building Structure,2001,31(8):69-72.(in Chinese))
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