Shear modulus of old timber
Alberto Cavalli , Daniele Cibecchini, Giacomo Goli, Marco Togni
iForest - Biogeosciences and Forestry, Volume 10, Issue 2, Pages 446-450 (2017)
doi: https://doi.org/10.3832/ifor1787-009
Published: Mar 24, 2017 - Copyright © 2017 SISEF
Research Articles
Abstract
Interest in both the time effect on the timber mechanical properties and the reuse of old solid timbers has prompted many research works since the 1970s, mainly focusing on evaluating bending strength (MOR) and stiffness (MOE). However, only few studies have investigated the effect of aging on shear modulus (G). In this work, transverse vibration test is used to calculate G and MOE of over 80 old timber beams. The MOE/G ratio and the relationship between G and different timber features are investigated. The main outcome of the research confirms that the MOE/G ratio is around 20, close to the value reported in literature for new solid timber. No relationship exists between G and MOE (r2=0.07) or between G and other timber features. When density and knots are used as predictors in a multiple regression model, the G prediction improves (r2=0.22). This work confirms that G is not affected by the age of timber.
Keywords
Flexural Vibration, Old Timber, Historical Timber Buildings, Reclaimed Timber
Authors’ Info
Authors’ address
Daniele Cibecchini
Giacomo Goli
Marco Togni
GESAAF - Department of Agricultural, Food and Forestry Systems - Section Forestry, Environment, Wood, Landscape, University of Florence, v. San Bonaventura 13, I-50145 Florence (Italy)
Corresponding author
Paper Info
Citation
Cavalli A, Cibecchini D, Goli G, Togni M (2017). Shear modulus of old timber. iForest 10: 446-450. - doi: 10.3832/ifor1787-009
Academic Editor
Andrea Cutini
Paper history
Received: Jul 31, 2015
Accepted: Nov 12, 2016
First online: Mar 24, 2017
Publication Date: Apr 30, 2017
Publication Time: 4.40 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2017
Open Access
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