Concentrated Load Capacity and Stiffness of Oriented Strand Board: Calculation versus Test
Publication: Journal of Structural Engineering
Volume 128, Issue 7
Abstract
In the design of a floor panel decking by calculation, the mechanical properties and theories of failure of the panel are used to determine the decking’s load capacity and stiffness. In this paper, the calculated and measured short-term concentrated load capacities and stiffnesses of one-way oriented strand board (OSB) panels, each loaded at the center of the span, are compared. Typical load capacities and stiffnesses are obtained from tests of simply supported OSB panels with ratios of span to thickness of 16.7 and 33.3. A punching shear-type failure characterized the failure mode of the panels. The calculated stiffnesses based on the panels’ elastic properties compare favorably with the experimentally determined stiffnesses. However, the calculated load capacities determined from the bending moduli of rupture and theories of failure in bending seriously underestimate the panels’ load capacities. A bending–punching shear interaction equation is proposed that enables the calculation of acceptable estimates of the load capacities. The results suggest that a bending–punching shear equation rather than a pure bending equation is needed for reliable calculation of the load capacities.
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References
ASTM. (1966). “Anisotropy in wood—Orientation effects in the mechanical behavior of anisotropic structural materials.” ASTM STP 405, West Conshohocken, Pa.
APA. (1976). “Test methods and performance requirements for floor and roof sheathing.” APA Research Rep. 135C, American Plywood Association, Tacoma, Wash.
BSI. (1989). “Particleboard Part 1: Methods of sampling, conditioning and test, clause 15—Determination of concentrated load strength.” BS 5669, London.
CEN. (1992). “Timber structures—Testing of wood panels for the determination of mechanical properties for structural purposes.” EN 789, Brussels, Belgium.
IStructE. (1993). “Structural news.” Struct. Eng., 7(10).
Karacabeyli, E., Lau, P., Henderson, C. R., Meakes, F. V., and Deacon, W.(1996). “Design rated oriented strandboard in CSA standards.” Can. J. Civ. Eng., 23, 431–443.
Kearley, V. C., and Carruthers, J. G. (1991). “Assessment of the distribution and effects of concentrated loads applied to wood-based sheet materials.” Report No. RD91204, Timber Research and Development Association (TRADA). Bucks, England.
Shrestha, D.(1999). “Shear properties tests of oriented strandboard panels.” Forest Products. J., 49, 41–46.
Soothill, C. (1984). “Concentrated load capacity (punching shear) of wood chipboard Part 2: Assessment of the influence of bending on the resistance of flooring chipboard to gradually applied concentrated loads.” Research Rep. No. 2/84, Timber Research and Development Association (TRADA), Bucks, England.
Thomas, W. H. (1996). “Bending behaviour of OSB decking under concentrated load.” PhD thesis, Univ. of Surrey, Guildford, Surrey, U.K.
Thomas, W. H. (2000). “Poisson’s ratios of an oriented strand board.” Wood Sci. Technol., in press.
Thomas, W. H.(2001). “Mechanical properties of structural-grade oriented strand board.” Holz Roh-Werkst., 59(6), 405–410.
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Information
Published In
Journal of Structural Engineering
Volume 128 • Issue 7 • July 2002
Pages: 908 - 912
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: May 8, 2001
Published online: Jun 14, 2002
Published in print: Jul 2002
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