Advanced Steel Construction

Vol. 5, No. 2, pp. 175-194 (2009)



D. Dubina 1*, A. Stratan 1 and Zs. Nagy 2

1 Politehnica University of Timisoara, Faculty of Civil Engineering,

Department of Steel Structures and Structural Mechanics,

str. Ioan Curea nr.1, Timisoara 300224, Romania

tel/fax: ++40.256.403932

2 Gordias SRL, Bucharest, Romania

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)




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  The paper summarises the results of an experimental program carried out in order to evaluate the performance of pitched roof cold-formed steel portal frames of back-to-back channel sections and bolted joints. Three different configurations of ridge and eaves joints were tested. The behaviour and failure mechanisms of joints were observed in order to evaluate their stiffness, strength and ductility. Joints between cold-formed members with bolts in the web only result in a reduction of joint moment capacity and premature web buckling. The component method was applied in order to characterise the joint stiffness and moment capacity for the purpose of frame analysis and design. The influence of joints characteristics on the global frame response under lateral (seismic) loads was analysed by considering three connection models. Full-scale tests were performed on cold-formed pitched-roof portal frames. The paper presents experimental observations and comparison to numerical predictions of frame response.



Cold formed construction, pitched roof portal frames, joint behaviour, full-scale tests.


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