中文摘要：

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。

英文摘要：

Two steel frames with 6 stories were respectively analyzed by first-order elastic method, second-order elasticmethod and second-order elasto-plastie method, and the results were compared. The operability of second-order analysisand design method of Code for design of steel structures draft and the consistency with first-order analysis and design methodwere investigated. The results indicate that the capacity design results respectively obtained by the second-order analysisand design method and the first-order analysis and design method are identical, while the lateral displacement results arequite different. It is recommended that the lateral displacement limits of first-order and second-order analysis should berespectively set. The second-order analysis and design results respectively obtained by the two initial imperfection definitionmethods are identical. The second-order analysis and design methods in the Code for design of steel structures draft havebetter operability.