超高層結(jié)構(gòu)鋼管柱計(jì)算長(zhǎng)度的分析探討
焦 柯， 吳桂廣
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（廣東省建筑設(shè)計(jì)研究院，廣州510010）[摘要]針對(duì)超高層框筒結(jié)構(gòu)中圓鋼管混凝土柱的計(jì)算長(zhǎng)度系數(shù)，分別采用無(wú)側(cè)移框架柱、有側(cè)移框架柱和歐拉公式三種方法進(jìn)行計(jì)算。對(duì)比分析結(jié)果表明，結(jié)構(gòu)上部框架柱的計(jì)算長(zhǎng)度系數(shù)按照無(wú)側(cè)移框架柱計(jì)算，結(jié)果偏不安全；采用有側(cè)移框架柱計(jì)算，結(jié)果遠(yuǎn)大于另外兩種方法的計(jì)算結(jié)果，過(guò)于保守。本文建議根據(jù)結(jié)構(gòu)屈曲模態(tài)和歐拉公式計(jì)算鋼管柱的等效計(jì)算長(zhǎng)度，并以該長(zhǎng)度的2倍作為鋼管柱承載力設(shè)計(jì)中的計(jì)算長(zhǎng)度。[關(guān)鍵詞]圓鋼管混凝土柱;二階效應(yīng);計(jì)算長(zhǎng)度系數(shù);歐拉公式中圖分類(lèi)號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)S1-0418-04作者簡(jiǎn)介：焦柯，教授級(jí)高級(jí)工程師，Email：gscad@21cn.com。Discussion on calculated length of steel tube concrete column of high-rise building structuresJiao Ke, Wu Guiguang（The Architectural Design and Research Institute of Guangdong Province,Guangzhou 510010,China）Abstract: Three methods about calculated length coefficient of round steel tube concrete column of high-rise frame-core wall structure are discussed, including non-sway frame, sway frame and the Euler formula. Contrastive analysis result shows comparatively insecurity if the calculated length coefficient of frame column of upper structure is calculated by non-sway frame. But the result is greater than the other two methods if the calculated length coefficient of frame column is calculated by sway frame. Basing the structural buckling mode and the Euler formula to calculate the calculated length, and using the doubled calculated length as actual calculated length in the design of bearing capacity of steel tube concrete column are suggested.Keywords: round steel tube concrete column;second order effects;calculated length coefficient;Euler formula
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