Realistic Assessment for Safety and Service Life of Reinforced Concrete Decks in Girder Bridges
Publication: Journal of Bridge Engineering
Volume 12, Issue 4
Abstract
The lack of safety of deck slabs in bridges generally causes frequent repair and strengthening. The repair induces great loss of economy, not only due to direct cost by repair, but also due to stopping the public use of such structures during repair. The major reason for this frequent repair is mainly due to the lack of a realistic and accurate assessment system for bridge decks. The purpose of the present paper is therefore to develop a realistic assessment system which can estimate reasonably the safety, as well as the service life of concrete bridge decks, based on the deterioration models that are derived from both the traffic loads and environmental effect. A deterioration model due to chloride ingress is first established. The damage models due to repetitive traffic loads considering the dry and wet conditions of deck slabs are proposed. These models are used to calculate the remaining life of a bridge deck slab. A prediction method for service life of deck slab due to loading and environmental effects is developed based on material, as well as structural evaluation. The proposed method includes the assessment of corrosion in material level, and the analyses of flexure, shear, and fatigue in structural level. Finally, an assessment system for prediction of safety and remaining service life is developed based on the theories established in this study. The developed assessment system will allow the correct diagnosis of damage state and the realistic prediction of service life of concrete decks in girder bridges.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Supports from MOCT and NRL in Korea are gratefully appreciated.
References
AASHTO. (2002). Standard specification for highway bridges, 195–212, Washington, D.C.
Ang, A. H.-S., and Tang, W. (1984). Probability concepts in engineering planning and design, Vol. II, Wiley, New York, 186–300.
Bakht, B., and Jaeger, L. G. (1985). Bridge analysis simplified, McGraw-Hill, New York.
Cao, L., Allen, J. H., Shing, P. B., and Woodham, D. (1996). “Behavior of RC bridge decks with flexural girders.” J. Struct. Eng., 122(1), 11–19.
Enright, M. P., and Frangopol, D. M. (1998). “Probabilistic analysis of resistance degradation of reinforced concrete bridge beams under corrosion.” Eng. Struct., 20(11), 960–971.
Frangopol, D. M., Lin, K. Y., and Estes, A. C. (1997). “Reliability of reinforced concrete girders under corrosion attack.” J. Struct. Eng., 123(3), 286–297.
Kim, A. T. V., and Stewart, M. G. (2000). “Structural reliability of concrete bridges including improved chloride-induced corrosion models.” Struct. Safety, 22, 313–333.
MacGregor, J. G., Mirza, S. A., and Ellingwood, B. (1983). “Statistical analysis of resistance of reinforced and prestressed concrete members.” ACI J., 80(16), 167–176.
Matsui, S. (1984). “Evaluation of punching shear strength in reinforced concrete decks.” Proc., JSCE, 348(1), 133–141.
Melchers, R. E. (1987). Structural reliability: Analysis and prediction, Wiley, New York, 254–322.
Middleton, C. R., and Hogg, V. (1998). “Review of deterioration models used to predict corrosion in reinforced concrete structures.” CUED/D-STRUCT/TR.173, Cambridge Univ., Cambridge, U.K.
Mirza, S. A., and MacGregor, J. G. (1979a). “Statistical descriptions of strength of concrete.” J. Struct. Div., 105(6), 1021–1037.
Mirza, S. A., and MacGregor, J. G. (1979b). “Variability of mechanical properties of reinforcing bars.” J. Struct. Div., 105(5), 921–937.
Mirza, S. A., and MacGregor, J. G. (1979c). “Variations in dimensions of reinforced concrete members.” J. Struct. Div., 105(4), 751–766.
Oh, B. H., Cha, S. W., and Jang, S. Y. (2002). “Development of high performance concrete having high resistance to chloride penetration.” Nucl. Eng. Des., 212(1–3), 221–231.
Oh, B. H., and Jang, B. S. (2003a). “Chloride diffusion analysis of concrete structures considering the effects of reinforcements.” ACI Mater. J., 100(2), 143–149.
Oh, B. H., and Jang, S. Y. (2003b). “Experimental investigation of the threshold chloride concentration for corrosion initiation in reinforced concrete structures.” Mag. Concrete Res., 55(2), 117–124.
Oh, B. H., and Jang, S. Y. (2004). “Prediction of diffusivity of concrete based on simple analytic equations.” Cem. Concr. Res., 34(3), 463–480.
Perdikaris, P. C., and Beim, S. (1988). “RC bridge decks under pulsating and moving load.” J. Struct. Eng., 114(3), 591–607.
Stewart, M. G., and Rosowsky, D. V. (1998). “Structural safety and serviceability of concrete bridges subject to corrosion.” J. Infrastruct. Syst., 4(4), 146–155.
Yoo, H. G., Kim, K. H., and Lew, K. S. (1999). “Evaluation of durability in reinforced concrete bridges.” Proc. of the Korea Concrete Institute, 11(2), 655–666.
Information & Authors
Information
Published In
Copyright
© 2007 ASCE.
History
Received: May 10, 2005
Accepted: Sep 18, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.