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A Novel LVL- Based Internal Reinforcement for Holes in Glulam Beams

https://research.thinkwood.com/en/permalink/catalogue1908
Year of Publication
2018
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Beams
Author
Tapia, Cristóbal
Aicher, Simon
Year of Publication
2018
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Beams
Topic
Mechanical Properties
Keywords
Hybrid Build Up
Parametric Study
Finite Element Method (FEM)
Reinforcement
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 20-23,2018. Seoul, Republic of Korea
Summary
A newly developed reinforcement system for glulam, actually representing a new generic wood com-pund, is presented. The composite consists on a hybrid cross-section, composed of intercalated layers of GLT and LVL, glued together along the width-direction of the beam. The specific build-up improves in first instance the mechanical properties of the glulam in the direction perpendicular to the grain significantly. Hence, the composite is especially well suited for the reinforcement of arrays of large holes in wide cross-sections. Secondly, the layers were tailored in such a manner, that the bending load capacity equalls that of the gross-cross-section. A parametric study was performed by means of the finite element method, to study the redistribution of stresses perpendicular to the main axis of the beam in the region of stress concentrations at one of the hole corners. Specifically, the load sharing of the vertical tensile force F_t,90 described in the German National Annex to EC5 was analyzed, and an analytical relationship depending on the thickness, elastic modulus and moment-to-shear-force ratio was developed.
Online Access
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Resource Link
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