Identification of weak sections in glulam beams using calculated stiffness profiles based on lamination surface scanning
2014 (English)In: Proceedings of the 2014 World Conference on Timber Engineering, Quebec, Canada, 10-14 August, Université Laval , 2014Conference paper (Refereed)
Models for estimation of structural properties of glued laminated timber (glulam) are generally based on the relationship between properties of the individual laminations and the properties of the glulam. In this investigation, a recently presented machine strength grading method based on laser scanning of fibre direction fields was applied for determination of axial modulus of elasticity (MOE) profiles along glulam laminations. These profiles were then used to calculate edgewise bending MOE (EB) profiles of glulam beams. The objectives were to investigate the relationship between position of bending failure and position of lowest EB value along investigated beams, and the relationship between the mentioned EB value and bending strength of the beams. It was found that both relationships were rather weak, whereas local bending MOE determined in accordance with EN408 was predicted with high accuracy on the basis of EB profiles.
Place, publisher, year, edition, pages
Université Laval , 2014.
laser scanning, fibre angle, glulam, laminating effect, tracheid effect
Research subject Technology (byts ev till Engineering), Civil engineering
IdentifiersURN: urn:nbn:se:lnu:diva-34439OAI: oai:DiVA.org:lnu-34439DiVA: diva2:720005
WCTE 2014, World Conference on Timber Engineering, Quebec City, Canada, August 10-14, 2014