Limit‐State Interactions in Reliability‐Based Design for Wood Structures
Publication: Journal of Structural Engineering
Volume 118, Issue 3
Abstract
Strength and serviceability limit states are closely interrelated in wood construction. The design of wood beams is often governed by limits on deflection, and the resulting section is larger than that required for flexure or shear strength. Moreover, members used in light‐frame construction are chosen from standard available dimension lumber sizes. Relatively few sizes are available for wood in comparison to the number of standard shapes available in steel construction. As a result, the sections selected in wood design may be significantly larger than what would otherwise be required by the design equations. This paper addresses the additional reliability gained with respect to ultimate strength by including the deflection limit state and by considering the availability of standard sections for individual wood members and parallel‐member systems. The significance of system effects from load sharing in serviceability reliability is assessed. The implications that these effects have for the ongoing development of load and resistance factor design (LRFD) provisions for engineered wood construction are examined.
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References
1.
ASCE Standard Minimum Design Loads for Buildings and Other Structures (ASCE 7‐88). (1990). ASCE, New York, N.Y.
2.
Barrett, J. D., and Foschi, R. O. (1978). “Duration of load and failure probability in wood. Part I. Modelling creep rupture.” Can. J. Civ. Engrg., 5(4), 505–532.
3.
Ellingwood, B., Galambos, T. V., MacGregor, J. G., and Cornell, C. A. (1980). “Development of a probability based load criterion for American National Standard A58.” Special Publication SPNo. 577, Nat. Bureau of Standards, Washington, D.C., Jun.
4.
Ellingwood, B., and Rosowsky, D. (1991). “Duration of load effects in LRFD for wood construction.” J. Struct. Engrg., ASCE, 116(2), 584–599.
5.
Folz, B., and Foschi, R. O. (1989). “Reliability‐based design of wood structural systems.” J. Struct. Engrg., ASCE, 115(7), 1666–1680.
6.
Foschi, R. O. (1984). “Reliability of wood structural systems.” J. Struct. Engrg., ASCE, 110(12), 2995–3013.
7.
Foschi, R. O., Folz, B. R., and Yao, F. Z. (1989). “Reliability‐based design of wood structures.” Structural Research Series, Report No. 34, Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, British Columbia, Canada.
8.
Gerhards, C. C. (1979). “Time‐related effects of loading on wood strength: A linear cumulative damage theory.” Wood Sci., 11(3), 139–144.
9.
Green, D. W., and Evans, J. W. (1987). Mechanical properties of visually graded lumber. Vols. 1–5, U.S. Dept. of Agric., Forest Service, Forest Products Lab., Madison, Wisc., Sept.
10.
McCutcheon, W. J. (1984). “Deflection of uniformly loaded floors: A beam‐spring analog.” Research Paper FPL 449, U.S. Dept. of Agric., Forest Service, Forest Products Lab., Madison, Wisc., Sept.
11.
McCutcheon, W. J. (1986). “Stiffness of framing members with partial composite action.” J. Struct. Engrg., 112(7), 1623–1637.
12.
McCutcheon, W. J., Vanderbilt, M. D., Goodman, J. R., and Criswell, M. E. (1981). “Wood joist floors: Effect of joist variability on floor stiffness.” Research Paper FPL 405, U.S. Dept. of Agric., Forest Service, Forest Products Lab., Madison, Wisc.
13.
Melchers, R. E. (1987). Structural reliability: Analysis and prediction. Ellis Horwood Ltd., John Wiley and Sons, New York, N.Y.
14.
Murphy, J. F., ed. (1988). Load and resistance factor design for engineered wood construction—A prestandard report. ASCE, New York, N.Y.
15.
National design specification for wood construction. (1986). Nat. Forest Products Assoc., Washington, D.C.
16.
Rosowsky, D. V., and Ellingwood, B. R. (1990). “Stochastic damage accumulation and probabilistic codified design for wood.” Civil Engineering Report 1990‐02‐02, Johns Hopkins Univ., Baltimore, Md., Aug.
17.
“Structural serviceability: A critical appraisal and research needs.” (1986). Ad Hoc Committee on Serviceability Res., Committee on Res. of the Struct. Div., J. Struct. Engrg., ASCE, 112(12), 2646–2664.
Information & Authors
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Published In
Journal of Structural Engineering
Volume 118 • Issue 3 • March 1992
Pages: 813 - 827
Copyright
Copyright © 1992 ASCE.
History
Published online: Mar 1, 1992
Published in print: Mar 1992
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