李  波^1,2，胡少兵¹，郭彦林²，冯宇飞¹
    (1 中国恩菲工程技术有限公司，北京100038; 2 清华大学，北京100084)

[摘要] 分析了传统计算长度法的不足及有色冶金工业钢框架结构厂房进行二阶分析的必要性。采用非线性有限元分析方法，利用ANSYS软件对实际工程中的钢结构厂房进行二阶弹性分析，表明结构在一定情况下二阶效应影响较大，不可忽略。此类厂房若按照一阶分析结果进行设计会出现安全度不够的情况。
[关键词] 计算长度系数；一阶分析；二阶分析

    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