【摘要】 在我国现行的《钢结构设计规范》GB 50017-2003[1]中,对于受弯和压弯构件的稳定设计,没有涉及扭矩对构件的作用,而在《冷弯薄壁型钢技术规范》GB 50018-2002中,既有受扭的单向和双向受弯构件,也有受扭的单向弯曲压弯构件的稳定计算方法。本文给出了受轴压、双向弯矩和扭矩作用的双轴对称,两端简支工形截面压弯构件的理论分析和稳定设计方法。建议将此方法列入准备修订的我国钢结构设计规范。现在,已经有许多外国学者对于受扭的钢构件作了研究。本文介绍了几种涉及扭矩作用的受弯和压弯构件的最新研究成果。将这些最新研究成果概括起来,可以作为修订我国钢结构设计规范的参考材料。为此,本文介绍了德国学者Lindner,J.和Glitsch,T.[2]对于受扭的厚实和非厚实梁,通过理论分析和试验研究,给出的梁的稳定设计建议;加拿大学者Ashkinadze,K.[3]修正了两端简支的宽翼缘工形截面受扭梁的稳定设计方法,将其扩展到受扭压弯构件的稳定设计;德国学者Kindmann,R.和Wolf,C.[4]作了两端简支工形和U形截面梁的试验研究;日本学者北田俊行等[5,6]作了两端简支受扭箱截面压弯构件的理论分析和试验研究。更多还原

【Abstract】 In the current Chinese Code for Design of Steel Structures GB 50017-2003[1],no consideration of the torsional action in the stability design about beams and beam-columns is made,but in the Chinese Technical Code for Design of Cold-Formed Thin-Walled Steel Structures GB 50018-2002,the torsional action is considered in the stability design of beams and beam-columns about mono-axial or biaxial bending action. This paper addresses the theoretical analysis and stability design of simply supported I-section steel beam-columns under combined axial compression,biaxial bending and torsion. This design method may be recommended for the revision of the Chinese Code for Design of Steel Structures. Up to now,many foreign scholars engaged in their researches about steel members under torsional action. This paper introduces several new study results about beams and beam-columns under torsional action. These new study results may be referenced for the revision of the Chinese Code for Design of Steel Structures. This paper introduces the recommendation for stability design of the compact and non-compact beams by German scholars Lindner,J. and Glitsch,T.[2] from their theoretical analysis and experimental researches; Canadian scholar Ashkinadze,K.[3] revises the stability design method of simply supported wide-flange I-beams under torsion and extends this design method to the beam-columns; German scholars Kindmann,R. and Wolf,C.[4] engage in their experimental researches about simply supported I- and U-section members under torsional action; Japanese scholars Kitada,T.,et al[5,6] engage in theoretical analysis and experimental researches about simply supported welded box section members under torsional action.更多还原