Strength Characteristics of OSB in Bending – Difference between Upper and Lower Panel Faces

Böhm, Martin; Šedivka, Přemysl; Bomba, Jan; Reisner, Jan

doi:10.5552/drind.2011.1036

Cited by 10 publications

(8 citation statements)

References 8 publications

(4 reference statements)

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“…The majority of these values were computed from the value presented in Table 5-1 and Table 5-2. The OSB web parallel MOE was assumed to be around 2.5 times the transversal MOE and the torsional shear modulus is assumed to be 100MPa based on average values in the literature (Grandmont 2011;Bohm et al 2011).…”

Section: Materials Parametersmentioning

confidence: 99%

Investigation of the lateral-torsional buckling behaviour of engineered wood I-joists with varying end conditions

Pelletier

Doudak

2019

Engineering Structures

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The need to include economical and yet environmentally friendly products in modern day structural systems has pushed the development of engineered wood products such as engineering wooden I-joists. These products are engineered to resist high transverse loads and use the wood material more efficiently. Beam members, especially those that are deep and have long spans, are prone to lateral-torsional buckling as a possible mode of failure. Laboratory testing rarely take into account actual end conditions and initial imperfection which might have a significant impact on the buckling behavior of beams. The current research project aims to investigate the lateraltorsional buckling of wooden I-joists. A total of 41 joists were tested using various commercial joists hangers and enhanced connections to represent different support conditions. A numerical 3D model was also developed using commercially available finite element program ABAQUS to determine the buckling loads and associated mode shapes of joists similar to those tested. It was demonstrated that the lateral stiffness of the joists' top flange support has a significant influence on the buckling load and that a stiffness variation of the bottom flange lateral support shows no significant impact on the buckling load. The results also suggest that an enhanced rotational connection can significantly increase the buckling load of a member. The verified FE model was capable of predicting the buckling load of wood I-joists with various end conditions and initial imperfections with reasonable accuracy. III AcknowledgementsI would like to express my deepest gratitude to my supervisor, Dr. Ghasan Doudak, to have given me the opportunity to work on this project. With his time and guidance, I have been able to accomplished this challenge and expand my engineering expertise. A special thanks goes to Dr. Magdi Mohareb for his support, his time in the examination of my work and the advice he has given me throughout the years. I must express my deepest gratitude to Simpson Strong-Tie to have provide the joists hangers tested with these experiments and Boise Cascasde for the I-joists specimens. I would also like to thank my student colleagues, Mr. Daniel Lacroix for the guidance and help, and Mr. Rémi St-Amour for helping me conduct the experimental work. I would like to also thank Ms. Ghazanfarah Hafeez, Ms. Sarah De Carufel, Mr. Corey Guertin Normoyle and Mr. Christian Viau for making these university years a great experience. J'aimerais remercier tout spécialement ma partenaire Clotilde Maurice, qui a toujours cru en mes capacités, qui m'a écouté et guidé dans mon cheminement et qui m'a fourni un soutien financier lors des dernières années. Sans elle à mes côtés, je n'aurais jamais pu entreprendre et relevé un tel défi professionnel. Je remercie également mes parents qui m'ont supportés dans nos décisions et m'ont permis de poursuivre ce rêve académique. Un merci tout particulier à mon ami de longue date, Bruno St-Aubin, avec qui j'ai passé plusieurs soirées à échanger des idé...

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Section: Materials Parametersmentioning

confidence: 99%

Investigation of the lateral-torsional buckling behaviour of engineered wood I-joists with varying end conditions

Pelletier

Doudak

2019

Engineering Structures

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“…A methodology to explain the fundamental formation of the vertical density profi le of OSB plates during the processing period was developed by Winistorfer et al (2000) and by Wang and Winistorfer (2000). The industrially manufactured OSB have "U" (Böhm et al, 2011) or rather "M" shaped vertical density profi le (Painter et al, 2006 a,b ) in numerical simulations assumed to be symmetrical about the mid-plane. Therefore, both the surface layers have a higher density than the internal one and consequently the OSB panel achieves higher bending strength and bending MOEs.…”

Section: Uvodmentioning

confidence: 99%

Elastic and Strength Properties of OSB Layers

Plenzler¹,

Ludwiczak-Niewiadomska²,

Strzelecki³

2017

Drvna ind.

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“…OSB can be used as closure of inner and outer faces of other boards, in ceilings, floors, and as substrate for roof covering. OSB is used mostly as an external closure with an impermeable layer due to its water tightness and mechanical properties (Böhm, Šedivka, Bomba, & Reisner, 2011).…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of heat treated OSB made of <i>Pinus taeda

2019

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Oriented strand board (OSB) panels, like plywood, are destined for structural use. Both of them may undergo preservative treatments that extend their lifetime and increase their resistance against weathering and xylophagous agents. One possibility is a heat treatment where the wood is exposed to temperatures above 130°C (403 K), which causes chemical, physical, and mechanical changes. The aim of this work was to produce OSB made of Pinus taeda thermally treated without replacement of atmosphere for an inert gas. The physical properties of density, moisture content, and thickness swelling in water immersion for 24 hour were evaluated. The mechanical properties of static bending were determined by the modulus of elasticity (MOE), modulus of rupture (MOR), and an internal bond test. Boards were heattreated at 160, 180, and 200°C (433, 453 and 473 K), and panels were produced with heat-treated strands at 160 and 180°C (433 and 453 K). The heat treatment of boards did not affect mechanical properties compared to the control treatment. The thermal treatment of strands reduced the physical and mechanical performances of the panels.

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Strength Characteristics of OSB in Bending – Difference between Upper and Lower Panel Faces

Abstract: • This article is focused on evaluating the differences between the upper and lower faces of OSB/3 -Superfi nish in the course

Cited by 10 publications

References 8 publications

Investigation of the lateral-torsional buckling behaviour of engineered wood I-joists with varying end conditions

Investigation of the lateral-torsional buckling behaviour of engineered wood I-joists with varying end conditions

Elastic and Strength Properties of OSB Layers

Production and characterization of heat treated OSB made of <i>Pinus taeda

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