钢结构二阶分析设计方法及其应用*
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（1 东南大学土木工程学院， 南京 210096； 2 江苏大学土木工程与力学学院， 镇江 212013）
［摘要］对两个6层钢框架结构进行了一阶弹性、二阶弹性和二阶弹塑性分析，对比分析了三种方法的设计结果，考察了《钢结构设计规范》（送审稿）中的二阶分析设计方法的可操作性以及与一阶分析设计结果的一致性。结果表明：一阶分析设计方法和二阶分析设计方法在杆件承载能力方面的设计结果基本一致，但位移方面的分析结果差距较大，建议分别设置一阶分析和二阶分析的位移限值；二阶分析设计方法中两种缺陷取值方法得到的设计结果基本一致；《钢结构设计规范》（送审稿）对于结构二阶分析设计方法的规定具有较强的可操作性。［关键词］钢结构; 二阶分析设计; 一阶分析设计; 初始缺陷中图分类号：TU391 文献标识码：A 文章编号：1002-848X(2015)21-0030-05
Application of the second-order analysis and design method of steel structuresShu Ganping1, Xie Fuzhe2, Liu Wei1（1 Department of Civil Engineering, Southeast University, Nanjing 210096， China; 2 Faculty of Civil Engineering and Mechanics, Jiangsu University， Zhenjiang 212013, China）Abstract: Two steel frames with 6 stories were respectively analyzed by firstorder elastic method, second-order elastic method and second-order elasto-plastic method, and the results were compared. The operability of second-order analysis and design method of Code for design of steel structures draft and the consistency with first-order analysis and design method were investigated. The results indicate that the capacity design results respectively obtained by the second-order analysis and design method and the first-order analysis and design method are identical, while the lateral displacement results are quite different. It is recommended that the lateral displacement limits of first-order and secondorder analysis should be respectively set. The second-order analysis and design results respectively obtained by the two initial imperfection definition methods are identical. The second-order analysis and design methods in the Code for design of steel structures draft have better operability.Keywords: steel structure; second-order analysis and design; first-order analysis and design; initial imperfection
*国家自然科学基金资助项目（51178098）,江苏大学高级人才基金资助项目。作者简介：舒赣平，博士，教授，博士生导师，Email:sgp0818@vip.sina.com。
