- 摘 要
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季 淵 童根樹 （浙江大學(xué)土木系 杭州 310027）
[提要] 有吊車廠房中框架柱軸力和截面都旱階形變化，對柱腳鉸接的階形柱的計算長度規(guī)范沒有規(guī)定。通過對柱腳鉸接的階形柱的彈性屈曲分析，得到了框架柱平面內(nèi)、平面外計算長度系數(shù)的表達(dá)式和計算表格，結(jié)果與有限元分析符合得很好。在此基礎(chǔ)上，對計算長度系數(shù)公式進(jìn)行了簡化，結(jié)果對于工程設(shè)計人員進(jìn)行框架柱的穩(wěn)定性設(shè)計具有重要的指導(dǎo)意義。
[關(guān)鍵詞] 門式剛架 穩(wěn)定性 計算長度 系數(shù) 輕鋼結(jié)構(gòu) 階形柱Because of the crane loads, columns in portal frames are stepped. The effective length of the stepped columns is not available either from the specifications or from the literature, when the column base is hinged. This paper analysed the buckling of hinged portal frame with crane loads. Formulas and tables of the effective length factors for the base-hinged column both in plane and out of plane are proposed. The results are in good agreement with exact solutions.
Keywords: gabled frame; stability; effective length; factor; light section steel structure
