钢结构薄柔截面构件稳定承载力研究综述

Review of Stability Capacity for Steel Members With Slender Section

我国《钢结构设计规范》中对含有薄柔截面的构件的稳定承载力如何确定缺少必要的规定.为了解决这个问题,从经典的理论研究入手,综述了国内外其他规范对此类构件的设计规定.重点分析了有效宽度法、直接强度法和有效截面法的计算原理,并比较了各自的优缺点.对钢构件薄柔截面板件局部屈曲和整体屈曲的相关性、冷弯薄壁型钢的畸变屈曲、地震下钢构件局部屈曲和塑性铰合理控制、钢结构设计规范修订等问题提出了深入研究的建议.

The provisions about the stability capacity of a member with the slender section have not been provided in Chinese Code for Design of Steel Structures （ GB50017—2003 ） . In order to solve this problem, in this paper, the classical theory analysis was reviewed and several steel design codes at home and aboard were summarized. Three methodologies such as effective width method （ EWM ） , direct strength method （ DSM） and effective section method （ ESM） , were emphasized and detailed comparisons among them were presented. Some suggestions for further research topics were proposed as follows： the interactions between local buckling and global buckling, the distortion buckling of cold formed steel members, how to control width-to-thickness ratio of components and plastic hinges of members efficiently in seismic design, and general principles in revising the Code for Design of Steel Structures, etc.