Novel Imperfection Method for Post-Buckling Strength of C-Sectioned CFS Members

Year 2023, Volume: 34 Issue: 6, 29 - 52, 01.11.2023

Özge Gizem Çağrıcı Rafet Aktepe Burcu Güldür Erkal

https://doi.org/10.18400/tjce.1212403

Abstract

The overall behavior of cold-formed steel (CFS) members is significantly affected from existing geometric imperfections. In this work, a mode shape-based imperfection coefficient computation method is developed to investigate the effects of initial geometric imperfections on member behavior. The point clouds of CFS members are collected and used to extract imperfection distributions and coefficients. The computed coefficients are integrated into the numerical model for analysis. Finally, axial loading tests are conducted to compare the numerical and experimental results. The results obtained using mode shape-based imperfection coefficients are generally closer to the experimental results than the common method used in practice.

Keywords

Cold-formed steel members, geometric imperfection detection, 3D scanning, finite element analysis, effects of initial geometric imperfections, automated deviation detection, column tests

Supporting Institution

TÜBİTAK

Project Number

217M513

Thanks

This material is based upon work supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant No. 217M513 and Hacettepe University.

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