Fatigue Testing and Performance of Welded Single-Support Bar Modular Bridge Joints
Publication: Journal of Bridge Engineering
Volume 20, Issue 5
Abstract
Single-support bar modular joints are widely used in large-span bridges because of their competitiveness and their ability to accommodate larger movements than conventional multiple-support bar joints can accommodate. Despite their general acceptance and use, detailed fatigue testing and design guidelines well suited for these joints are still not well documented. This has been the main impetus for carrying out this experimental and analytical investigation on the fatigue performance of a single-support bar modular bridge expansion joint with welded stirrups. Three identical subassemblies were tested in fatigue to establish the experimental fatigue curve for the main critical details. In addition, a few variants of stirrup specimens were separately tested under static and fatigue loadings to investigate failure modes and the effects of important geometric parameters such as bottom-plate thickness on the stress range and fatigue resistance of the stirrups. The tested joint subassemblies and stirrup specimens developed characteristic fatigue cracks in and around the stirrups and their welded connections. These cracks are classified into three distinct categories, and expressions for computing their associated stress ranges and fatigue resistance are presented. This study reveals that secondary bending moments within the stirrup make a major contribution to the stress range at critical sections of the stirrup. This contribution should be included for adequate prediction of the fatigue life of single-support bar modular joints and can be reasonably determined with basic models using one-dimensional (1D) beam elements for the center beam and for the stirrup. The importance of secondary bending moments within the stirrup is strongly related to the relative stirrup bottom plate-to-vertical leg bending stiffness and to the relative stirrup vertical leg-to-center beam bending stiffness.
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Acknowledgments
The authors thank Professor Robert J. Connor, coauthor of the NCHRP 402 Report, who visited the authors’ test facility during the course of this research and provided valuable input. The authors also thank John Lescelleur and Fernando Avandano from the technical staff of École de Technologie Supérieure for their contributions to the test campaigns. Support from École de Technologie Supérieure and Goodco-ZTech is also gratefully acknowledged.
References
AASHTO. (2010). AASHTO LRFD bridge construction specifications, SI units, 3rd Ed., Washington, DC.
AASHTO. (2012). AASHTO LRFD bridge design specifications, SI units, 6th Ed., Washington, DC.
Agarwal, A. C. (1991). “Static and dynamic testing of a modular expansion joint in the Burlington Skyway.” Proc., 3rd World Congress on Joint Sealing and Bearing Systems for Concrete Structures, American Concrete Institute, Detroit.
Ancich, E. J. (2011). “Structural dynamics of modular bridge expansion joints resulting in environmental noise emission and fatigue.” Ph.D. thesis, Faculty of Engineering and Information Technology, Univ. of Technology, Sydney, NSW, Australia.
ASTM. (2007). “Standard specification for high-strength low-alloy columbium-vanadium structural steel.” A572/A572M-07, West Conshohocken, PA.
ASTM. (2010). “Standard test method for compressive properties of rigid plastics.” D695-10, West Conshohocken, PA.
Canadian Standards Association (CSA). (2013). “General requirements for rolled or welded structural steel.” CSA G40.21-13, Toronto.
Chaallal, O., Sieprawski, G., and Guizani, L. (2006). “Fatigue performance of modular joints for bridges.” Can. J. Civ. Eng., 33(8), 921–932.
Connor, R. J., and Dexter, R. J. (1999). “Fatigue design of modular bridge expansion joints.” Transportation Research Record 1688, Transportation Research Board, Washington, DC.
Crocetti, R., and Edlund, B. (2003). “Fatigue performance of modular bridge expansion joints.” J. Perform. Constr. Facil., 167–176.
Dexter, R. J., Connor, R. J., and Kaczinski, M. R. (1997). “Fatigue design of modular bridge expansion joints.” National Cooperative Highway Research Program (NCHRP) Rep. 402, Transportation Research Board, Washington, DC.
Dexter, R. J., Mutziger, M. J., and Soberg, C. B. (2002). “Performance testing for modular bridge joint systems.” National Cooperative Highway Research Program (NCRHP) Rep. 467, Transportation Research Board, Washington, DC.
Heinilä, S., Marquis, G., and Björk, T. (2008). “Observations on fatigue crack paths on the corners of cold-formed high strength steel tubes.” Eng. Fract. Mech., 75(3–4), 833–844.
Kim, I.-T., and Yamada, K. (2005). “Fatigue life evaluation of welded joints under combined normal and shear stress cycles.” Int. J. Fatigue, 27(6), 695–701.
Roeder, C. W. (1993). “Fatigue cracking in modular expansion joints.” Rep. No. WA-RD 306.1, Washington State DOT, Olympia, WA.
Roeder, C. W. (1998). “Fatigue and dynamic load measurements on modular expansion joints.” Constr. Build. Mater., 12(2–3), 143–160.
Spuler, T., Ancich, E., Savioz, P., and O’Suilleabhain, C. (2011). “Developments in modular expansion joint technology—Codes and testing in Australia, America and Europe.” Proc., 8th Austroads Bridge Conf., Austroads, Sidney, NSW, Australia, 346–359.
State of Queensland Department of Transport and Main Roads. (2009). Technical specification, MRTS90 modular bridge expansion joints, Brisbane, QLD, Australia.
Tschemmernegg, F. (1991). “The design of modular expansion joints.” Proc., 3rd World Congress on Joint Sealing and Bearing Systems for Concrete Structures, American Concrete Institute, Detroit, 67–86.
Zuada Coelho, B., Vervuurt, A. H. J. M., and Peelen, W. H. A. (2013). “Dynamics of modular expansion joints: The Martinus Nijhoff Bridge.” Eng. Struct., 48(3), 144–154.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 20 • Issue 5 • May 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 2, 2013
Accepted: Jun 5, 2014
Published online: Jul 23, 2014
Published in print: May 1, 2015
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