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http://dx.doi.org/10.12989/scs.2017.25.6.727

Strength and stiffness of cold-formed steel portal frame joints using quasi-static finite element analysis  

Mohammadjani, Chia (Department of Civil Engineering and Environmental Engineering, The University of Auckland)
Yousefi, Amir M. (Department of Civil Engineering and Environmental Engineering, The University of Auckland)
Cai, Shu Qing (Department of Civil Engineering and Environmental Engineering, The University of Auckland)
Clifton, G. Charles (Department of Civil Engineering and Environmental Engineering, The University of Auckland)
Lim, James B.P. (Department of Civil Engineering and Environmental Engineering, The University of Auckland)
Publication Information
Steel and Composite Structures / v.25, no.6, 2017 , pp. 727-734 More about this Journal
Abstract
This paper describes a quasi-static finite element analysis, which uses the explicit integration method, of the apex joint of a cold-formed steel portal frame. Such cold-formed steel joints are semi-rigid as a result of bolt-hole elongation. Furthermore, the channel-sections that are being connected have a reduced moment capacity as a result of a bimoment. In the finite element model described, the bolt-holes and bolt shanks are all physically modelled, with contact defined between them. The force-displacement curves obtained from the quasi-static analysis are shown to be similar to those of the experimental test results, both in terms of stiffness as well as failure load. It is demonstrated that quasi-static finite element analysis can be used to predict the behavior of cold-formed steel portal frame joints and overcome convergence issues experienced in static finite element analysis.
Keywords
cold-formed steel; bolted moment-connections; finite element analysis; quasi-static;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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