【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。更多还原

【Abstract】 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.更多还原