美国房屋钢结构规范几个问题的评论  

Comments on Some Issues of the American Specification for Structural Steel Buildings

作　　者：陈绍蕃[1] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,西安710055

出　　处：《建筑钢结构进展》2012年第6期57-62,共6页Progress in Steel Building Structures

摘　　要：讨论美国房屋钢结构规范ANSI/AISC 360-10正文和条文说明中存在的几个问题。首先是关于压弯构件Cm系数的命名、取值和避免与另一系数Cb重复。其次是关于轴压构件板件宽厚比限值λr规定的矛盾和压弯构件λr的缺失。再次是焊接压弯构件弯扭屈曲的计算公式。最后是单边连接单角钢压杆等效长细比如何应用于高强度角钢。This article discusses some issues relevant to provisions in the main body of the Specification ANSI/AISC 360-10 together with relevant parts in the commentary.These comments focus first on the Cm factor of beam-columns,including:appropriate designation of this factor,more precise values of the factor for beam-columns subjected to transverse loading,and avoidance of duplication of Cm with(the inverse of) the factor Cb.The second part of the comments is on the limiting slenderness parameter for noncompact element λr.Contradiction and inconsistency are pointed out in provisions relevant to λr,for both axially compressed members and beam-columns respectively.The third part deals with the independent interaction formula of welded beam-columns for the limit state of lateral-torsional buckling.Lastly discussed is the equivalent slenderness ratio for single angle struts of high strength steel,connected by one leg at both ends.

关 键 词：压弯构件Cm系数 宽厚比限值 单薄板件 弯扭屈曲 单角钢压杆 等效长细比 

分 类 号：TU318[建筑科学—结构工程]