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    李  波^1,2，胡少兵¹，郭彥林²，馮宇飛¹
    (1 中國恩菲工程技術(shù)有限公司，北京100038; 2 清華大學(xué)，北京100084)

[摘要] 分析了傳統(tǒng)計(jì)算長度法的不足及有色冶金工業(yè)鋼框架結(jié)構(gòu)廠房進(jìn)行二階分析的必要性。采用非線性有限元分析方法，利用ANSYS軟件對(duì)實(shí)際工程中的鋼結(jié)構(gòu)廠房進(jìn)行二階彈性分析，表明結(jié)構(gòu)在一定情況下二階效應(yīng)影響較大，不可忽略。此類廠房若按照一階分析結(jié)果進(jìn)行設(shè)計(jì)會(huì)出現(xiàn)安全度不夠的情況。
[關(guān)鍵詞] 計(jì)算長度系數(shù)；一階分析；二階分析

    Second-order analysis on a typical steel industrial plant
    Li Bo^1,2, Hu Shaobing¹, Guo Yanlin², Feng Yufei¹
    (1 China ENFI Engineering CO., LTD. Beijing 100038, China; 2 Tsinghua University, Beijing 100038, China)

Abstract: The deficiency of effective length approach and the necessity of second-order analysis design on nonferrous engineenng steel industrial plant are emphasized. Second-order analysis approach by nonlinear finite-element wiht ANSYS is used to design an industrial plant. The example indicates that second-order effect should not be neglect and the result of first-order analysis is not safe enough for industrial plant.
Keywords: effective length; first-order analysis; second-order analysis