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（廣東省建筑設(shè)計研究院， 廣州 510010）
［摘要］佛山保利商務(wù)中心結(jié)構(gòu)高度為250m，建筑頂部采用了中國傳統(tǒng)習俗中漂浮的孔明燈造型。因此，如何實現(xiàn)頂部天燈通透輕盈的效果是結(jié)構(gòu)設(shè)計的難點。天燈結(jié)構(gòu)采用了空間鋼框架-單層雙向立體（四面）索網(wǎng)幕墻結(jié)構(gòu)體系，沿天燈外輪廓設(shè)置了空間格構(gòu)柱和鋼桁架作為索網(wǎng)幕墻的支承。通過對拉索施加合理的預應力，保證其有足夠的剛度承擔平面外的風荷載和地震作用。為保證結(jié)構(gòu)的安全性以及降低施工難度，鋼結(jié)構(gòu)節(jié)點采用設(shè)置加勁外環(huán)肋的加強方式且部分采用鑄鋼節(jié)點，并對特殊節(jié)點進行了有限元分析，分析結(jié)果表明此加強方式安全可行。
［關(guān)鍵詞］佛山保利商務(wù)中心； 超高空天燈； 超高空單層雙向立體（四面）索網(wǎng)幕墻； 空間鋼框架； 風振分析； 加勁外環(huán)肋； 鑄鋼節(jié)點
中圖分類號：TU391， TU318文獻標識碼：A文章編號：1002-848X(2016)21-0095-06
Design and study on super high lantern structure of Poly Commercial Central Tower in Foshan
Xiang Qian, Luo Chiyu, Guo Fengshuo
(Architectural Design and Research Institute of Guangdong Province， Guangzhou 510010， China)
Abstract:The structural height of Poly Commercial Central Tower in Foshan is 250m and there is a floating Kongming lantern shape in traditional Chinese custom at the top of this project. Therefore, it is a difficulty in structural design for how to achieve the transparent and light effect of the top lantern. The structural system of the super high lantern adopts spatial steel frame-monolayer-bidirectional-stereoscopic cable curtain wall, and the spatial lattice column and steel truss are set along the outer contour of the lantern to use as supports of cable curtain wall. Reasonable pre-stress was conducted on cables to ensure the structure has enough stiffness to resist out-of-plane wind load and seismic action. To ensure structural safety and reduction of construction difficulty, the steel joints adopt strengthening method of external annular stiffener and partly adopt cast steel joints. And finite element analysis on special joints was conducted. Analysis results show that this strengthening method is safe and feasible.
Keywords:Poly Commercial Central Tower in Foshan; super high lantern; super high-monolayer-bidirectional-stereoscopic cable curtain wall; spatial steel frame; wind-induced vibration analysis; external annular stiffener; cast steel joint
作者簡介：向前，碩士，高級工程師，所副總工程師，一級注冊結(jié)構(gòu)工程師，Email:xq@gdadri.com。
