Load-deformation behaviour prediction of timber beams externally reinforced with composite materials

Karunasena, Karu W. and Grice, Andrew (2006) Load-deformation behaviour prediction of timber beams externally reinforced with composite materials. In: 10th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-10), 3-5 August 2006, Bangkok, Thailand.


Old timber beams have a tendency to weaken with age. In order to repair old timber structures, a rehabilitation technique is required. A rehabilitation method that is getting attention in civil engineering applications recently involves bonding sheets (or bars) of fibre reinforced polymer (FRP) to the tensile face of the affected beam member to improve its strength and deflection characteristics. This paper presents a prediction model based on the virtual work method and Bazan- Buchanan non-linear constitutive law for timber. The model allows the moment-curvature and load deflection relations of FRP reinforced timber beams to be predicted. The model was verified using experimental results from the literature. A parametric analysis was conducted to show the influence of key parameters such as FRP area and FRP type on the load-deflection characteristics of beams loaded in four point bending. From the model presented here, It IS possible to obtain the ultimate load and deflection that each beam can sustain before failure. As expected, the results show that application of an FRP composite to timber beams improves the strength and deflection characteristics of the beam. This indicates that this method may be a quite viable option for the rehabilitation of old timber beam structures

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited with permission of the publishers, Asian Center for Engineering Computations and Software and Conference Organisers (School of Civil Engineering, Asian Institute of Technology). More information about the conference is available on the website http://www.easec10.net/.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 02 Jun 2010 10:25
Last Modified: 20 Dec 2011 01:28
Uncontrolled Keywords: timber beams; rehabilitation; load-deflection; prediction model; composite materials; strengthening; fibre-reinforced polymer; ultimate load; deflection; non-linear constitutive relation
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091210 Timber, Pulp and Paper
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: 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/8251

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