钢框架的高等分析与设计

针对现行钢结构设计方法的缺陷与不足,强调了钢结构进行高等分析与设计的重要性,从结构整体稳定的角度,基于改进塑性铰方法,讨论了计算单元、初始缺陷的引入、节点连接刚度及构件的塑性设计、结构的二阶分析等钢结构高等分析的基本要点,并对现行的极限状态分项系数法和改进塑性铰分析方法进行了比较。典型算例结果表明,采用的方法和NIDA-NAF程序可以准确考虑各种缺陷和设计参数对钢结构稳定承载力的影响,钢结构高等分析设计是现代钢结构设计发展的方向。

Advanced analysis method and design of steel structures

Aiming at the deficiency of the current steel structures design code, the necessity of advanced analysis and design for steel structures is emphasized, and the basic principles and methods of the advanced analysis are discussed. Based on the improved plastic hinge method, some factors about structural overall stability analysis and design such as the basic element, the initial imperfection, the joint connection rigidity, the material plasticity and second order analysis are analyzed in this paper. The comparison between the current limit state partial factor method and the modified plastic hinge analysis method is also presented. The calculation example results indicate that the method presented is efficient, exact and robust for the steel structure stability analysis and design.