Structural modeling of cold-formed steel portal frames. (November 2015)

• Record Type: Journal Article
• Authors: Zhang, Xi; Rasmussen, Kim J.R.; Zhang, Hao
• Is Part Of: Structures. Volume 4(2015)
• Page Start: 58
• Page End: 68
• Publication Date: 2015-11
• Subjects: Steel portal frames -- Shell and beam element models -- Local and distortional buckling -- Semi-rigid joints; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2015.10.010
• Languages: English
• ISSNs: 2352-0124

Abstract

Abstract: The paper describes the modeling of pitched roof cold-formed steel portal frames with slender cross-sections. Two types of finite element models are introduced: a shell finite element model and a modified beam finite element model. The shell element model involves explicit modeling of each structural member and accounts for the semi-rigid behavior of apex and eave joints by incorporating spring-like elements. The beam element model utilizes a reduced tangent rigidity method to account for cross-sectional instability. Both models are compared with results of experimentally tested portal frames, and good agreement is demonstrated.