05.42: Evaluation of ultimate strength and plastic deformation capacity of square hollow section members under bending shear. (13th September 2017)

• Record Type: Journal Article
• Authors: Sato, Kosuke; Ikarashi, Kikuo
• Is Part Of: Ce/papers. Volume 1:issue 2/3(2017)
• Page Start: 1407
• Page End: 1416
• Publication Date: 2017-09-13
• Subjects: square steel tube -- box section -- local buckling -- width–thickness ratio; Civil engineering -- Periodicals; 624
• DOI: 10.1002/cepa.183
• Languages: English
• ISSNs: 2509-7075

Abstract

ABSTRACT: The purpose of this study is to evaluate ultimate strength and plastic deformation capacity of square hollow section members under bending shear governed by local buckling as a function of member shapes and loading conditions. First, elastic local buckling strength under bending shear derived from theoretical analysis is shown. A new normalized width–thickness ratio S H based on elastic local buckling strength and full plastic strength is proposed. Then, after understanding the elastic local buckling behavior purely determined by member shapes and loading conditions, the large deformation behavior under monotonic bending shear is examined using numerical analysis and structural testing. The ultimate strength and plastic deformation capacity are evaluated using the new normalized width–thickness ratio S H as a function of width–thickness ratio, aspect ratio, gradient of bending moment, and angle of applied force. Finally, the large deformation behavior under cyclic bending shear is examined using structural testing. The relation between the ultimate strength or plastic deformation capacity and the new normalized width–thickness ratio S H is reported.