Cold-formed austenitic stainless steel SHS brace members under cyclic loading: Finite element modelling, design considerations

YongHyun Cho , Fangying Wang , TaeSoo Kim

Abstract

This study presents a numerical investigation into the hysteretic behavior of cold-formed austenitic stainless steel square hollow section (SHS) brace members using a commercial finite element (FE) analysis software ABAQUS/Standard. The initial/post buckling and fracture life of SHS brace members are comprehensively investigated through parametric studies with FE models incorporating ductile fracture model, which is validated against the existing laboratory test results collected from the literature. It is found that the current predictive models are applicable for the initial buckling strengths of SHS brace members under cyclic loading, while result in significant inaccuracy in predictions for the post-buckling strength and fracture life. The modified predictive model is therefore proposed and the applicability was then confirmed through excellent comparisons with test results for cold-formed austenitic stainless SHS brace members.

Key Words

austenitic stainless steel; brace; buckling; fracture life; hysteretic behavior; seismic design; square hollow section

Address

YongHyun Cho — Sustainable Building Research Center, Hanyang University ERICA, Ansan 15588, Republic of Korea
Fangying Wang — Department of Civil Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
TaeSoo Kim — School of Architecture and Architectural Engineering, Hanyang University ERICA, Ansan 15588, Republic of Korea

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