钢框架柱平面内整体稳定验算改进建议Ⅱ:数例验证(2)

Modified approach for consideration of stability in design of columns in plane steel frames Ⅱ:Case studies(2)

针对我国现行钢结构设计规范[1]存在的框架柱平面内整体稳定验算的不足,提出了改进建议[2]。利用单层和3层钢框架的有限元分析结果,对现行规范方法和本文建议方法在内力计算与框架柱平面内整体稳定验算和截面强度进行了详细比较,对本文建议方法的精度与可行性进行了评价。

In order to overcome the limitations of the current design code, such as the analysis methods of the internal forces and the effective length method used in stability of steel columns, one modified elastic methods based on design code method for analysis and check for limit state strengths of steel frames are outlined. In this paper,the results from a comprehensive set of portal frames and three- storey frames are summarized to establish the accuracy and validity of these two approaches for evaluation of the maximum strength of steel framing columns. Comparisons are made to results from rigorous distributed plasticity of analyses.