TECHNICAL PAPERS
Aug 1, 1983

Statistical Analysis of Timber Bridges

Publication: Journal of Structural Engineering
Volume 109, Issue 8

Abstract

Because of large variations in the longitudinal modulus of elasticity of wood it is almost impossible to determine actual values of dead and live load moments and shears in a timber bridge. An approach is presented to calculate the mean values of moments and shears and their coefficients of variation.

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References

1.
Allen, D. E., “Limit States Design—A Probabilistic Study,” Canadian Journal of Civil Engineering, Vol. 3, 1975, pp. 36–49.
2.
Bakht, B., and Bullen, R. C., “Analysis of Orthotropic Right Bridge Decks,” Highway Engineering Computer Branch/B/15 (ORTHOP), Department of the Environment, London, England, 1973.
3.
Bakht, B., Cheung, M. S., and Aziz, T. S., “Application of a Simplified Method of Calculating Longitudinal Moments to the Proposed Ontario Highway Bridge Design Code,” Canadian Journal of Civil Engineering, Vol. 6, No. 1, 1979, pp. 36–50.
4.
Cusens, A. R., and Pama, R. P., Bridge Deck Analysis, John Wiley and Sons, New York, N.Y., 1975.
5.
Erickson, E. C. O., and Romstad, K. M., “Distribution of Wheel Loads on Timber Bridges,” U.S. Forest Service Research Paper FPL 44, Madison, Wisc., Dec., 1965.
6.
Goodman, J. R., and Bodig, J., “Orthotropic Elastic Properties of Wood,” Journal of the Structural Division, ASCE, Nov., 1970, pp. 2301–2319.
7.
Johnson, J. W., “Relationships Among Moduli of Elasticity and Rupture: Seasoned and Unseasoned Coast Type Douglas Fir and Seasoned Western Hemlock,” Symposium on Timber and Timber Structures, Transactions of the Engineering Institute of Canada, Dec., 1965.
8.
Leonhardt, F., and Andre, W., Die Vereinfachte Tragerrost berechnung, Julius Hoffman Press, Stuttgart, 1950.
9.
Lightfoot, E., “A Grid Framework Analogy for Laterally Loaded Plates,” International Journal of Mechanical Science, Vol. 6, 1964.
10.
Ontario Highway Bridge Design Code, Ontario Ministry of Transportation and Communications, Downsview, Ontario, 1979.
11.
Sawko, F., and Wilcock, B. K., “Computer Analysis of Bridges Having Varying Section Properties,” The Structural Engineer, Vol. 45, No. 11, 1967.
12.
Standard Specifications for Highway Bridges, American Association of State Highway and Transportation Officials, Washington, D.C., 1977.

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Published In

Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 109Issue 8August 1983
Pages: 1761 - 1779

History

Published online: Aug 1, 1983
Published in print: Aug 1983

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Authors

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Baidar Bakht
Principal Research Officer, Research and Development Branch, Ontario Ministry of Transportation and Communications, 1201 Wilson Ave., Central Bldg., Downsview, Ontario, Canada M3M 1J8

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