Slip between Glue-Laminated Beams in Stress-Laminated Timber Bridges: Finite-Element Model and Full-Scale Destructive Test
Publication: Journal of Bridge Engineering
Volume 16, Issue 2
Abstract
Stress-laminated timber bridge decks consist of several sawn timber beams or glue-laminated (glulam) beams held together with prestressed steel bars. Frictional shear stresses between the beams transfer loads between individual beams. Because the vertical (transverse) shear stress component has been extensively discussed, this paper considers the horizontal shear stress. A full-scale test and corresponding finite element simulations for a specific load case confirmed that horizontal slip occurred between beams. Using an elastic-plastic material model, the finite element model handled both vertical and horizontal frictional slip. The results showed that the finite element model gives reliable results and that slip in general leads to permanent deformations, which may increase with load cycling. Horizontal slip between beams over a large area of the bridge deck begins at a low load, resulting in a redistribution of load between beams, but does not lead to immediate failure. Vertical slip between beams starts at a high load close to the load application point and leads to failure.
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References
ABAQUS Inc. (1998). ABAQUS theory manual, Version 5.8, ABAQUS Inc., Pawtucket, Rhode Island.
Ekevad, M. (2006). “Modelling of dynamic and quasi-static events with special focus on wood-drying distortions.” Ph.D. thesis, Division of Wood Science and Technology, Luleå University of Technology, Skellefteå, Sweden.
Holzer, S. M., Loferski, J. R., and Dillard, D. A. (1989). “A review of creep in wood: Concepts relevant to develop long-term behaviour predictions for wood structures.” Wood Fiber Sci., 21(4), 376–392.
Kalbitzer, T. (1999). “Experiments regarding the coefficient of friction between laminations.” Diplomarbeit Nr. 97, TU Munich.
Oliva, M. G., and Dimakis, A. (1989). “Behavior of stress-laminated timber highway bridge.” J. Struct. Eng., 114(8), 1850–1869.
Ritter, M. A. (2005). Timber bridges: Design, construction, inspection and maintenance (Part one), University Press of the Pacific, Honolulu.
Ritter, M. A., Duwadi, S. R., and Wacker, J. P. (2000). “Field performance of stress-laminated timber bridges.” Transp. Res. Rec., 1740, 96–103.
Ritter, M. A., and Lee, H. P. D. (1996). Recommended construction practices for stress-laminated wood bridge decks. Forest Products Laboratory, USDA Forest Service, Madison, WI.
Sarisley, E. F., Jr., and Accorsi, M. L. (1990). “Prestress level in stress-laminated timber bridges.” J. Struct. Eng., 116(11), 3003–3019.
Swedish National Board for Housing, Building and Planning. (2003). “Regelsamling för konstruktion. Boverkets konstruktionsregler, BKR, byggnadsverkslagen och byggnadsverksförordningen [Swedish design rules published by the Swedish National Board for Housing, Building and Planning].” BKR 2003 Boverket, Publikationsservice, Karlskrona, Sweden.
Swedish Transport Administration. (2004).“Swedish bridge design rules. [Vägverkets allmänna Tekniska beskrivningar för nybyggande och förbättringar av broar].” BRO 2004 (2004:56), Vägverket Borlänge, Borlänge, Sweden.
Tsai, S. W., and Wu, E. M. (1971). “A general theory of strength for anisotropic materials.” J. Compos. Mater., 5, 58–80.
Wipf, T. J., Klaiber, F. W., and Funke, R. W. (1990). “Longitudinal glued laminated timber bridge modeling.” J. Struct. Eng., 116(4), 1121–1134.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 2 • March 2011
Pages: 188 - 196
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Feb 22, 2010
Accepted: Jul 2, 2010
Published online: Jul 10, 2010
Published in print: Mar 1, 2011
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