Influence of cross-section on the strength of timber beams

Bahadori-Jahromi, Ali ORCID:, Kermani, Abdy, Zhang, Binsheng, Harte, Annette M., Bayne, Karen, Turner, John and Walford, Bryan (2006) Influence of cross-section on the strength of timber beams. Proceedings of the Institution of Civil Engineers, Structures & Buildings, 159 (2). pp. 103-114. ISSN 0965-0911

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This paper investigates the strength and deformation characteristics of lightweight timber composite beams manufactured with six different cross-sectional profiles in comparison with readily available laminated veneer lumber (LVL) and glued-laminated (Glulam) beams. All engineered profiles comprised solid timber or LVL flanges and three-ply plywood webs. The number of webs varied from one to four. The beams had an overall depth of 290 mm and were either 88 mm or 106 mm wide. A study was conducted to provide a comparison of the beam designs and to determine possible effects of cross-sectional configuration and connection details on the structural properties of the beams. To enable a realistic analysis, 12 beams were replicated for each design. The individual components of the beams were tested prior to assembly to obtain the modulus of elasticity and shear modulus and were grouped to provide an even distribution of the material properties. The addition of extra webs to the I-beam profile significantly enhanced the bending and shear capacity of the beam while maintaining a high strength to weight ratio. The boxed I-beam proved to be the most efficient to manufacture and displayed superior structural performance compared with the rest of the profiles in terms of flexural stiffness and bending and shear capacity. The experimental results confirmed the significant contribution of the shear deflection to the total deflection of the I-beams, box beams and even solid section beams.

Item Type: Article
Identifier: 10.1680/stbu.2006.159.2.103
Additional Information: Copyright © ICE Publishing, all rights reserved.
Keywords: Timber; Laminated veneer lumber; Glulam; Flexural stiffness; Bending; Shear; Laboratory tests; Varied cross-sections; Deflection; Performance evaluation
Subjects: Construction and engineering > Built environment
Construction and engineering > Civil and structural engineering
Construction and engineering
Depositing User: Ali Bahadori-Jahromi
Date Deposited: 26 May 2016 07:51
Last Modified: 06 Feb 2024 15:44


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