Abstract
A fracture-critical bridge along Interstate Highway 35 with a relatively high volume of traffic had exceeded its original design life and was monitored before and after a repair was implemented to strengthen the bridge. Strain gauges and crack propagation gauges were installed at critical locations near existing fatigue cracks identified from annual manual inspections. The initial data were evaluated and indicated that the fatigue life of the bridge had been exceeded, such that the bridge needed to be repaired or replaced. The bridge owner placed the bridge on a fast-track schedule for replacement; however, because it would take 2 to 3 years to complete the bridge, the bridge owner also elected to strengthen the bridge in the interim. The girders were strengthened by installing bolted cover plates between the top flanges of the longitudinal girder and transverse floor beams. The response of the bridge was monitored before, during, and after the bridge was strengthened. In the strengthened condition, the fatigue behavior of the bridge was dramatically improved due to unintentional composite behavior between the bolted cover plates and the concrete deck. Developing composite behavior in noncomposite, aging bridges may be a potential method of mitigating future fatigue damage.
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Acknowledgments
This research was funded by the National Institute of Standards and Technology (NIST) through the Technology Innovation Program (TIP). The opinions expressed in this paper are those of the researchers and do not necessarily represent those of the sponsor. The researchers would like to thank the Texas Department of Transportation for providing access to the bridge. In addition, Vasilis Samaras, Matt Reichenbach, and Ali Abu Yosef made significant contributions to the research project.
References
AASHTO. (2010). “LRFD bridge design specifications.” Washington, DC.
ASTM. (2011). “Standard practices for cycle counting in fatigue analysis.” ASTM E1049-85, West Conshohocken, PA.
Downing, S., and Socie, D. (1982). “Simple rainflow counting algorithms.” Int. J. Fatigue, 4(1), 31–40.
Fasl, J. D. (2013). “Techniques for evaluating fatigue using strain data and estimating the remaining fatigue life in steel bridges.” dissertation, Univ. of Texas at Austin, Austin, TX.
Fasl, J. D., Helwig, T. A., and Wood, S. L. (2015). “Evaluating accumulation of fatigue damage in steel bridges using measured strain data.” AISC Eng. J., 52(3), 175–184.
Fasl, J. D., Helwig, T. A., Wood, S. L., and Frank, K. (2012). “Using strain data to estimate the remaining fatigue life of a fracture-critical bridge.” J. Transp. Res. Rec., 2313, 63–71.
Kwon, G., et al. (2007). “Strengthening existing non-composite steel bridge girders using post-installed shear connectors.”, Center for Transportation Research, Austin, TX.
Miner, M. (1945). “Cumulative damage in fatigue.” J. Appl. Mech., 12, A159–A164.
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Published In
Journal of Performance of Constructed Facilities
Volume 30 • Issue 5 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 20, 2015
Accepted: Dec 7, 2015
Published online: Feb 8, 2016
Discussion open until: Jul 8, 2016
Published in print: Oct 1, 2016
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