减少竖向荷载作用下高层扭转体型结构附加扭矩的措施研究  

Research on measures to reduce additional torsion of high-rise structure with twisted shapes under vertical load

作　　者：钱鹏 何冰冰 包联进 周建龙[1,2] QIAN Peng;HE Bingbing;BAO Lianjin;ZHOU Jianlong(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200002,China;Shanghai Engineering Technology Research Center of Super High-Rise Building Design,Shanghai 200002,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]华东建筑设计研究总院,上海200002 [2]上海超高层建筑设计工程技术研究中心,上海200002 [3]同济大学土木工程学院,上海200092

出　　处：《建筑结构》2021年第13期1-8,共8页Building Structure

摘　　要：扭转体型的建筑较一般建筑具有更加丰富的外部轮廓,结构设计也更为复杂。这是因为体型的扭转通常会引起结构受力状态的变化,特别是对于外框扭转框架-核心筒的高层和超高层结构,在竖向荷载作用下由于外框的扭转会对核心筒产生一个很大的附加扭矩,大大增加了结构的设计难度和造价。为此以外框扭转框架-核心筒高层结构为研究对象,首先研究了竖向荷载作用下结构产生附加扭矩的力学原理,同时给出计算附加扭矩的近似理论公式;在此基础上,提出了4种可能减小附加扭矩的措施,通过理论和数值模型分析的方法验证不同措施对减小核心筒附加扭矩的影响规律。结果表明:增加与扭转方向相反的斜撑是减小附加扭矩最为有效和全面的措施,而其他3项措施对减小附加扭矩的作用不大。The building with twisted shape has more abundant external contours than the general building,and the structural design is more complex.Because the torsion of the shape usually causes the change of the stress state of the structure,especially for the high-rise and super high-rise structures frame-corewall with torsion outside the frame.Under the vertical load,the torsion of the frame will produce a great additional torsion on the corewall,which greatly increases the design difficulty and cost of the structure.For this purpose,the frame-corewall high-rise structure with torsion outside the frame was taken as the research object.Firstly,the mechanical principle of the additional torsion generated by the structure under vertical load was studied,and the approximate theoretical formula for calculating the additional torsion was given.On this basis,four possible measures to reduce the additional torsion were put forward,and the effect of different measures on reducing the additional torsion of the corewall was verified by theoretical and numerical model analysis methods.The results show that increasing the diagonal brace in the opposite direction of torsion is the most effective and comprehensive measure to reduce the additional torsion,while the other three measures have little effect on reducing the additional torsion.

关 键 词：外框扭转 框架-核心筒结构 附加扭矩 反向斜撑 

分 类 号：TU973[建筑科学—结构工程]