Built-Up Cold-Formed Steel Beams with Corrugated Webs Connected with Spot Welding

• Published in: Advanced Materials Research Vol. 1111; pp. 157 - 162
• Main Authors: Benzar, Ştefan, Burcă, Mircea, Dubină, Dan, Ungureanu, Viorel
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 07.07.2015
• Subjects: Construction; Corrugating; Flanges; Mathematical models; Seams; Sheet metal; Spot welding; Webs; Spot Welding; Cold-Formed Steel; Corrugated Web; Beams
• ISBN: 9783038354925; 3038354929
• ISSN: 1022-6680; 1662-8985; 1662-8985
• DOI: 10.4028/www.scientific.net/AMR.1111.157

Corrugated web girders emerged in the past two decades. Their main advantages consists in the possibility to use slender webs avoiding the risk of premature local buckling. Consequently, higher moment capacity might be obtained increasing the beam depth with really thin webs, which are stiffened by the corrugations. Increased interest for this solution was observed for the main frames of single-storey steel buildings and steel bridges. A new solution was proposed at the Politehnica University of Timisoara, in which the beam is composed by a web of trapezoidal steel sheet and flanges of back-to-back lipped channel steel sections. This solution uses self-drilling screws for connecting flanges to the web and to ensure the continuity of the web as seam fasteners. Starting from this new technological solution the paper extends and investigates the use of spot welding as seam fastening to build the web, in order to increase the degree of automation of fabrication. Experimental work of specimens in shear having two or three layers of steel sheets connected by spot welding will be presented. The results will be implemented on a numerical model in order to study the behaviour of the beams presented above.