- 摘 要
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(中國建筑東北設(shè)計(jì)研究院有限公司， 沈陽 110006)
［摘要］以高1 180m的中國建筑千米級摩天大樓為載體，在3個(gè)周邊單塔+中央交通核每100m通過2層連接平臺剛性連接而成巨型組合結(jié)構(gòu)體的3個(gè)單塔上設(shè)置5種不同的巨型支撐布置方案，同時(shí)也考慮了在連接平臺桁架上設(shè)置不同斜撐方式的影響，來研究巨型支撐對結(jié)構(gòu)剛度、剛重比、周期、樓層剪力、位移及框架承擔(dān)剪力占基底剪力百分比等結(jié)構(gòu)設(shè)計(jì)控制指標(biāo)的影響。研究結(jié)果表明：連接平臺桁架上下設(shè)置X形斜撐對結(jié)構(gòu)提供的剛度明顯大于人字形斜撐；巨型支撐可顯著提高結(jié)構(gòu)的整體剛度，增大結(jié)構(gòu)的剛重比，減小結(jié)構(gòu)的周期和樓層位移角；巨型支撐對結(jié)構(gòu)的剛度比、樓層剪力影響不大；巨型支撐可顯著增大外框承擔(dān)的剪力，增強(qiáng)外框架的剛度，提高框架承擔(dān)基底剪力的百分比。
［關(guān)鍵詞］千米級摩天大樓； 超限高層； 巨型組合結(jié)構(gòu)體系； 巨型支撐； 剛重比； 周期
中圖分類號：TU973文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)03-0010-05
Impact of different arranged location of mega bracings on 1 000m-high skyscraper of CSCEC
Chen Peng, Chen Yong, Wu Yihong
(China Northeast Architectural Design & Research Institute Co., Ltd., Shenyang 110006, China)
Abstract:The 1 000m-high out-of-code high-rise building skyscraper has height of 1 180m and it consists of 3 main surrounding towers and one central traffic tower which are rigidly connected by two stories 15m-high connected platform in every 100m. Considering impact of different bracing arrangements on trusses on connected platforms, five different types of mega bracing schemes were set on the 3 surrounding towers, to study the influence of mega bracing on structural design controlling parameters including structural rigidity, rigidity-to-gravity ratio, period, story shear forces, displacements, ratio of shear force carried by frames to total base shear force. The study results indicate that X-shaped bracing contributes a much larger stiffness than V-shaped bracing. Mega bracing can significantly increase the overall stiffness of the structure, resulting in an increase in rigidity-to-gravity ratio, and a decrease in structural period and inter-story displacements. Mega bracings have little influence on structural stiffness ratio and inter-story shear forces. Mega bracing can significantly increase the shear force carried by exterior frames, enhance stiffness of the exterior frames, and increase the ratio of shear force carried by frames to total base shear force.
Keywords:1 000m-high skyscraper; out-of-code high-rise building; mega composite structural system; mega bracing; rigidity-to-gravity ratio; period
*中建股份科技研發(fā)課題(CSCEC-2010-Z-01-02)。
作者簡介：陳鵬，碩士，高級工程師，Email：chenpenghit@126.com。
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