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(1 華東建筑設(shè)計(jì)研究總院， 上海 200002；2 上海超高層建筑設(shè)計(jì)工程技術(shù)研究中心， 上海 200002；3 同濟(jì)大學(xué)土木工程學(xué)院， 上海 200092)
［摘要］扭轉(zhuǎn)體型的建筑較一般建筑具有更加豐富的外部輪廓，結(jié)構(gòu)設(shè)計(jì)也更為復(fù)雜。這是因?yàn)轶w型的扭轉(zhuǎn)通常會(huì)引起結(jié)構(gòu)受力狀態(tài)的變化，特別是對于外框扭轉(zhuǎn)框架-核心筒的高層和超高層結(jié)構(gòu)，在豎向荷載作用下由于外框的扭轉(zhuǎn)會(huì)對核心筒產(chǎn)生一個(gè)很大的附加扭矩，大大增加了結(jié)構(gòu)的設(shè)計(jì)難度和造價(jià)。為此以外框扭轉(zhuǎn)框架-核心筒高層結(jié)構(gòu)為研究對象，首先研究了豎向荷載作用下結(jié)構(gòu)產(chǎn)生附加扭矩的力學(xué)原理，同時(shí)給出計(jì)算附加扭矩的近似理論公式；在此基礎(chǔ)上，提出了4種可能減小附加扭矩的措施，通過理論和數(shù)值模型分析的方法驗(yàn)證不同措施對減小核心筒附加扭矩的影響規(guī)律。結(jié)果表明：增加與扭轉(zhuǎn)方向相反的斜撐是減小附加扭矩最為有效和全面的措施，而其他3項(xiàng)措施對減小附加扭矩的作用不大。
［關(guān)鍵詞］外框扭轉(zhuǎn)；框架-核心筒結(jié)構(gòu)；附加扭矩；反向斜撐
中圖分類號：TU973 文獻(xiàn)標(biāo)識(shí)碼：A文章編號：1002-848X(2021)13-0001-08
Research on measures to reduce additional torsion of high-rise structure with twisted shapes under vertical load
QIAN Peng1,2, HE Bingbing1,2, BAO Lianjin1,2,3, ZHOU Jianlong1,2
(1 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002， China； 2 Shanghai Engineering Technology Research Center of Super High-Rise Building Design, Shanghai 200002， China；3 College of Civil Engineering, Tongji University, Shanghai 200092， China)
Abstract: 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.
Keywords:torsional frame； frame-corewall structure； additional torsion； reverse brace
作者簡介：錢鵬，博士，高級工程師，Email：Peng_qian@ecadi.com。
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