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Assessment of test-piece size for punching shear capacity of orthotropic panels: Case study of OSB

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Abstract

The punching shear capacity of a wood-based panel is useful in the assessment of its suitability in flooring. A test method for determination of the punching shear capacity of particleboard is given in British Standard BS 5669. The suitability of the span of test piece specified in BS 5669 for punching shear capacity characterisation of oriented strand board (OSB) has been assessed from concentrated load tests of 15 and 18-mm thick OSB panels under 25 and 50-mm diameter load applicators. Elliptical fan-shaped crack envelopes with major axes that were roughly of the same order as the spans of the test pieces characterised the failure of the test pieces under the 25-mm diameter load applicator. However, when the test pieces were loaded via the 50-mm diameter load applicator, the spans of the test pieces appeared too small to simulate the characteristic elliptical crack envelope. An expression for the test-piece span for characterisation of punching shear capacities under both 25 and 50-mm diameter load applicators has been proposed. The proposed expression is a useful starting point in the determination of suitable test-piece span for punching shear capacity characterisation of OSB.

Résumé

La capacité de cisaillement par perforation d’un panneau à base de bois est utile pour évaluer l’appropriation de son choix dans les planchers. La norme britannique BS 5669 propose une méthode visant à déterminer la capacité de cisaillement par perforation de panneaux de particules. La conformité de la dimension du spécimen mentionnée dans la norme BS 5669 sur la caractérisation de la capacité de cisaillement par perforation de panneaux de copeaux orientés (OSB) a été évaluée à partir d’essais en charge concentrée de panneaux de copeaux orientés de 15 et 18 mm d’épaisseur sous des applicateurs de charges de 25 et 50 mm de diamètre. Des enveloppes de fissuration en forme d’éventails elliptiques, dont les axes principaux avaient à peu près la même taille que la portée des spécimens, ont montré la rupture des spécimens sous un applicateur de charge d’un diamètre de 25 mm. Cependant, lorsque les spécimens ont été chargés par l’applicateur de 50 mm de diamètre, la portée des spécimens s’est révélée trop petite pour simuler l’enveloppe de fissuration elliptique caractéristique. La portée des spécimens pour la caractérisation de la capacité de cisaillement par perforation sous des applicateurs de charges de 25 et 50 mm de diamètre a été proposée. Il s’agit d’un point de départ utile dans la détermination de la portée la mieux adaptée pour la caractérisation de la capacité de cisaillement par perforation de panneaux de copeaux orientés.

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  1. Techsult Ltd., 19 Tansy Close, GU4 7XN, Guildford, Surrey, UK

    W. H. Thomas

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  1. W. H. Thomas
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Thomas, W.H. Assessment of test-piece size for punching shear capacity of orthotropic panels: Case study of OSB. Mat. Struct. 36, 139–144 (2003). https://doi.org/10.1007/BF02479528

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  • DOI: https://doi.org/10.1007/BF02479528

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