高層建筑結(jié)構(gòu)整體穩(wěn)定性研究
王國安
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王國安 （艾奕康建筑設(shè)計(jì)（深圳）有限公司，深圳 518059）
［摘要］結(jié)構(gòu)的側(cè)向剛度和重力荷載之比即剛重比，是反映結(jié)構(gòu)整體穩(wěn)定性的關(guān)鍵參數(shù)。當(dāng)高層建筑的高寬比足夠大時(shí)，結(jié)構(gòu)的剛重比一般接近規(guī)范規(guī)定的下限值，甚至低于下限值，計(jì)算的剛重比的準(zhǔn)確性就顯得非常重要。著重分析了彎剪型結(jié)構(gòu)整體穩(wěn)定性驗(yàn)算時(shí)存在的問題，比較結(jié)構(gòu)頂點(diǎn)位移在考慮重力P-Δ效應(yīng)前后的變化，以及其與剛重比及結(jié)構(gòu)屈曲臨界荷載系數(shù)的關(guān)系，提出了補(bǔ)充驗(yàn)算結(jié)構(gòu)整體穩(wěn)定性的建議。［關(guān)鍵詞］高層建筑；整體穩(wěn)定性；剛重比；結(jié)構(gòu)頂點(diǎn)位移；屈曲分析中圖分類號(hào)：TU973文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)06-0127-05Research on structural stability of tall buildingsWang Guo' an (AECOM Architecture Design Company in Shenzhen, Shenzhen 518059, China)Abstract: The rigidity-to-gravity ratio of structures is defined as the ratio of lateral stiffness to gravity, which is a key parameter to the global stability of structures. If the height-width ratio of the high-rise building is large enough，the structural rigidity-to-gravity ratio is normally closed to the lower limit value provided by the code, even below the lower limit. In this case, the accuracy of calculating the rigidity-to-gravity ratio seems to be essential. The problem existed in checking global stability of flexure-shearing structures was analyzed. The relationships between the variation of the structural peak displacement before or after the P-Δ effect and the rigidity-to-gravity ratio as well as critical buckling load factor of structures were discussed. Suggestions to complement the examination of overall structural stability were also proposed.Keywords: tall building; global stability; rigidity-to-gravity ratio; structural peak displacement; critical buckling analysis作者簡介：王國安，高級(jí)工程師，一級(jí)注冊結(jié)構(gòu)工程師，Email:guoan.wang@aecom.com.參考文獻(xiàn)［1］JGJ 3—2010高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］.北京：中國建筑工業(yè)出版社，2011.［2］徐培福，肖從真.高層建筑混凝土結(jié)構(gòu)的穩(wěn)定設(shè)計(jì)［J］.建筑結(jié)構(gòu)，2001，31（8）：69-72.［3］李云貴，黃吉鋒.混凝土結(jié)構(gòu)重力二階效應(yīng)分析［C］//第二十屆全國高層建筑結(jié)構(gòu)學(xué)術(shù)交流會(huì)論文集，2008.［4］徐培福，傅學(xué)怡，王翠坤，等.復(fù)雜高層建筑結(jié)構(gòu)設(shè)計(jì)［M］.北京：中國建筑工業(yè)出版社，2005.
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