Identification of weak sections in glulam beams using calculated stiffness profiles based on lamination surface scanning
2014 (English)In: WCTE 2014 - World Conference on Timber Engineering, Proceedings, World Conference on Timber Engineering (WCTE) , 2014Conference paper, Published paper (Refereed)
Abstract [en]
Models for estimation of structural properties of glued laminated timber (glulam) are generally based on the relationship between properties of the individual laminations and 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 EN 408 was predicted with high accuracy on the basis of EB profiles.
Place, publisher, year, edition, pages
World Conference on Timber Engineering (WCTE) , 2014.
Keywords [en]
Fibre angle, Glulam, Laminating effect, Laser scanning, Tracheid effect, Bending strength, Grading, Laser applications, Scanning, Surface analysis, Timber, Wooden beams and girders, Direction fields, Glued laminated timber (glulam), Machine strength grading, Stiffness profiles, Surface scanning, Laminating
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-45593Scopus ID: 2-s2.0-85067737489OAI: oai:DiVA.org:ri-45593DiVA, id: diva2:1456787
Conference
World Conference on Timber Engineering: Renaissance of Timber Construction, WCTE 2014, 10 August 2014 through 14 August 2014
2020-08-062020-08-062020-12-01Bibliographically approved