Behaviour of structural glulam beams from sustainable fibre composite sandwich panels

Manalo, Allan and Aravinthan, Thiru and Karunasena, Warna (2010) Behaviour of structural glulam beams from sustainable fibre composite sandwich panels. In: 5th Civil Engineering Conference in the Asian Region and Australasian Structural Engineering Conference (CECAR5 and ASEC2010): Innovative Community Building, 8-12 Aug 2010, Sydney, Australia.

Abstract

This paper presents the results of experimental investigation into the flexural and shear behaviour of glue-laminated (glulam) fibre composite sandwich beams with a view of using this material for structural applications. The building block of these structural beams is a new generation composite sandwich structure made up of glass fibre reinforced polymer skins and high strength core material. In the experimental investigation, beams with 1, 2, 3, and 4 composite sandwich panels glued together were subjected to 4-point static bending and asymmetrical beam shear tests in the flatwise and in the edgewise positions. The results of the flexural test showed that the glulam sandwich beams in the edgewise position failed with higher strength but have slightly lower bending stiffness than beams in the flatwise position. The results however indicated that the bending stiffness of the flatwise specimens converges to that of the edgewise specimens with increasing laminations. More importantly, the specimens in the edgewise position failed with greater ductility due to the progressive failure of the fibre composite skins while the specimens in the flatwise position failed in a brittle manner due to debonding between the skin and core. Under shear loading, the behaviour of the sandwich beams is significantly influenced by the shear strength and modulus of the fibre composite skin. It has been demonstrated that the glue-laminated sandwich beams exhibited better performance than the individual sandwich beams. The results of the study suggest the high possibility of using composite sandwich construction in the development of structural laminated beams.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Depositing User: Mr Allan Manalo
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 07 Jan 2011 02:34
Last Modified: 01 Dec 2014 01:08
Uncontrolled Keywords: fibre composites; sandwich structures; glue-laminated beams; flexure; shear; concrete beams
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective (SEO2008): B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/9290

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