Investigating the structural performance of multi-webs I-beams

Bahadori-Jahromi, Ali, Zhang, G., Harte, Annette M., Walford, Bryan, Bayne, Karen and Turner, John (2006) Investigating the structural performance of multi-webs I-beams. Journal of the Institute of Wood Science, 17 (3). pp. 148-158. ISSN 0020-3203

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Abstract

This paper compares the structural performance of nine different light composite timber beams including I-beams. Beams were made with 9 mm plywood webs, which were glued to timber/LVL flanges. Finished beams had 'I' or rectangular cross sections with a height of 290 mm and width of 88 mm or 106 mm depending on their cross section. The differences between the profiles were the method of connection and number of webs. Extensive laboratory testing carried out to determine the effect of circular web-openings on the load/deflection and the shear capacity of the different profiles is described. This is followed by determination of the maximum bearing capacity of each design. This study also introduces a new testing method to evaluate the tension resistance of the flange/web connection in single and Double I-beams. Increasing the diameter of the circular hole was found to lead to a significant reduction in the maximum loading capacity of the beams while it had less effect on load/deflection performance. Additional webs were found to significantly enhance the structural performance of the I-beam. In terms of pulling resistance, experimental results show that tension stress perpendicular to the grain direction of the flange is a controlling factor for evaluating the resistance of the beam under hanging loads.

Item Type: Article
Uncontrolled Keywords: I-beam; Web-opening; Shear; Tension; Compression; Composite beams
Subjects: Construction and engineering > Built environment
Construction and engineering > Civil and structural engineering
Depositing User: Rod Pow
Date Deposited: 15 Jan 2015 11:29
Last Modified: 29 Jul 2016 14:47
URI: http://repository.uwl.ac.uk/id/eprint/1071

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