Simplified Procedure for Evaluating the Effects of Creep and Shrinkage on Prestressed Concrete Girder Bridges and the Application of European and North American Prediction Models
Publication: Journal of Bridge Engineering
Volume 18, Issue 12
Abstract
The effects of time-dependent phenomena on concrete prestressed girder bridges are investigated. The study concerns the case of bridges built directly in their final configuration and that of bridges built by a sequence of stages in which geometry, restraints, and loads vary until the final configuration is achieved. An analytical approach based on the principles of aging linear viscoelasticity and the age-adjusted effective modulus method is followed. The paper has two aims: the first is to provide an efficient and simplified tool for the evaluation of the structural response in the early stages of design; the second is to compare the results of the analyses on actual cases of bridges when different shrinkage and creep prediction models are used. Numerical applications show that the influence of stress redistribution on bending moments, attributable to the change in static schemes, is reduced by the load-balancing effect of the dead load and prestressing and that bending moment diagrams for bridges in service do not change significantly with the different prediction models. Opposite results are found on deflections, which differ significantly in reference to the model used. Differences between predictions models are underlined, suggesting that designers should manage them with prudence to predict the long-term performance of concrete. Finally, Eurocode predictions always underestimate final deflections and stress redistribution because of the static scheme variation.
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References
AASHTO. (2007). AASHTO LRFD bridge design specifications, customary U.S. units, 4th Ed., Washington, DC.
American Concrete Institute (ACI). (2008). “Guide for modelling and calculating shrinkage and creep in hardened concrete.” ACI 209.2R08, Farmington Hills, MI, 1–45.
American Concrete Institute (ACI). (2012). “Time dependent effects in concrete structures.” ACI 209.3RXX, Farmington Hills, MI.
Arici, M., and Granata, M. F. (2007a). “Analysis of curved incrementally launched box concrete bridges using Transfer Matrix Method.” Bridge Struct., 3(3–4), 165–181.
Arici, M., and Granata, M. F. (2007b). “Removal of temporary supports and creep effects in the sequential construction of bridges.” Structural implication of shrinkage and creep of concrete, N. J. Gardner and M. A. Chiorino, eds., American Concrete Institute (ACI), Farmington Hills, MI, 37–51.
Arici, M., and Granata, M. F. (2009). “Durability evaluations on the bridge over the Ruwais lagoon at Jeddah.” Concrete repair, rehabilitation and retrofitting, H. Beushausen, ed., Vol. 1, Balkema, Rotterdam, Netherlands 1–10.
Arici, M., Granata, M. F., and Recupero, A. (2011). “The influence of time-dependent phenomena in segmental construction of concrete cable-stayed bridges.” Bridge Struct., 7(4), 125–137.
Bažant, Z. P. (1972). “Prediction of concrete creep effects using age-adjusted effective modulus method.” ACI J., 69(4), 212–217.
Bažant, Z. P., and Baweja, S. (2000). “Creep and shrinkage prediction model for analysis and design of concrete structures: Model B3.” Proc., Adam Neville Symp.: Creep and Shrinkage-Structural Design Effects, A. Al-Manaseer, ed., American Concrete Institute (ACI), Farmington Hills, MI, 1–83.
Bažant, Z. P., Hubler, M. H., and Yu, Q. (2011). “Excessive creep deflection: An awakening.” Concr. Int., 33(8), 44–46.
Bažant, Z. P., Li, G., and Qiang, Y. (2008). “Prediction of creep and shrinkage and their effects in concrete structures: Critical appraisal.” Creep, shrinkage and durability mechanics of concrete and concrete structures, T. Tanabe, ed., Taylor & Francis, London, 1275–1289.
Bažant Z. P., Qiang Y., and Li, G. (2012a). “Excessive long-time deflections of prestressed box girders. I: Record-span bridge in Palau and other paradigms.” J. Struct. Eng., 138(6), 676–686.
Bažant Z. P., Qiang Y., and Li, G. (2012b). “Excessive long-time deflections of prestressed box girders. II: Numerical analysis and lessons learned.” J. Struct. Eng., 138(6), 687–696.
Burgoyne, C. J., and Scantlebury, R. C. (2006). “Why did Palau Bridge collapse?” Struct. Eng., 84(11), 30–37.
Casalegno, C., Sassone, M., and Chiorino, M. A. (2010). “Time dependent effects in cable-stayed bridges built by segmental construction.” Proc., 3rd Int. fib Congress, Precast/Prestressed Concrete Institute, Chicago, 1–12.
Chiorino, M. A. (2005). “A rational approach to the analysis of creep structural effects.” Shrinkage and creep of concrete, N. J. Gardner and W. Weiss, eds., American Concrete Institute (ACI), Farmington Hills, MI, 107–141.
Chiorino, M. A., and Carreira, D. J. (2012). “Factors affecting shrinkage and creep of hardened concrete and guide for modeling—A state-of-the-art report on international recommendations and scientific debate.” Indian Concr. J., 86(12), 11–24.
Chiorino, M. A., and Casalegno, C. (2012). “Evaluation of the structural response to the time-dependent behaviour of concrete: Part I–An internationally harmonized format.” Indian Concr. J., 86(12), 25–36.
Chiorino, M. A., Creazza, G., Mola, F., and Napoli, P. (1986). “Analysis of aging viscoelastic structures with n-redundant elastic restraints.” Proc., 4th RILEM Int. Symp. on Creep and Shrinkage of Concrete: Mathematical Modelling, Z. P. Bažant, ed., Northwestern Univ., Evanston, IL, 623–644.
Chiorino, M. A., Napoli, P., Mola, F., and Koprna, M. (1984). “CEB design manual on structural effects of time-dependent behaviour of concrete.” CEB Bulletin d’Information 142/142bis, Georgi, Saint-Saphorin, Switzerland.
Chiorino, M. A., and Sassone, M. (2010). “Further considerations and updates to time-dependent analysis of concrete structures.” Structural concrete. Textbook on behavior, design and performance, 2nd ed., Vol. 2, International Federation for Structural Concrete, Lausanne, Switzerland, 43–69.
Chiu, H. S., Chern, J. C., and Chang, K. C. (1996a). “Long term deflection control in cantilever prestressed concrete bridges. I: Control method.” J. Eng. Mech., 122(6), 489–494.
Chiu, H. S., Chern, J. C., and Chang, K. C. (1996b). “Long term deflection control in cantilever prestressed concrete bridges. II: Experimental verification.” J. Eng. Mech., 122(6), 495–501.
Dezi, L., Menditto, G., and Tarantino, A. M. (1993). “Viscoelastic heterogeneous structures with variable structural system.” J. Eng. Mech., 119(2), 238–250.
Dilger, W. H. (1982). “Creep analysis of prestressed concrete structures using creep-transformed section properties.” PCI J., 27(1), 98–117.
Duan, L., Chen, K., and Tan, A. (2000). “Prestressed concrete bridges.” Chapter 10, Bridge engineering handbook, W.-F. Chen and L. Duan, eds., CRC, Washington, DC.
European Committee for Standardization (CEN). (2005). “Design of concrete structures, part 1.1.” Eurocode 2, Brussels, Belgium.
Gardner, N. J., and Lockman, M. J. (2001). “Design provision for drying shrinkage of normal strength concrete.” ACI Mater. J., 98(2), 159–167.
Ghinassi, G., Fazio, J., and Dreas, G. (1994). Viscosità e metodi costruttivi nei ponti in c.a.p. a travata continua, realizzati per fasi, Alinea, Firenze, Italy.
Granata, M. F., Margiotta, P., and Arici, M. (2013a). “A parametric study of curved incrementally launched bridges.” Eng. Struct., 49, 373–384.
Granata M. F., Margiotta P., Recupero A., and Arici M. (2012). “Construction stages of cable-stayed bridges with composite deck.” Bridge Struct., 8(3–4), 93–106.
Granata, M. F., Margiotta, P., Recupero, A., and Arici, M. (2013b). “Concrete arch bridges built by lattice cantilevers.” Struct. Eng. and Mech., 45(5), 703–722.
Granata, M. F., Margiotta, P., Recupero, A., and Arici, M. (2013c). “Partial elastic scheme method in cantilever construction of concrete arch bridges.” J. Bridge Eng., 18(7), 663–672.
International Federation for Structural Concrete (fib). (2012a). Model Code 2010—Final draft, Vol. 1, Lausanne, Switzerland.
International Federation for Structural Concrete (fib). (2012b). Model Code 2010—Final draft, Vol. 2, Lausanne, Switzerland.
Jirasek, M., and Bažant, Z. P. (2002). Inelastic analysis of structures, Wiley, Chichester, U.K.
midas 2012 [Computer software]. Seongnam-si, Korea, Midas Information Technology.
Mola, F., and Giussani, F. (2003). “Long-term behaviour of cable stayed bridges.” Studies and researches, Vol. 24, Fratelli Pesenti, Politecnico di Milano, Milan, Italy, 153–187.
Müller, H. S. (1993) “Considerations on the development of a database on creep and shrinkage tests.” Proc., 5th Int. RILEM Symp. on Creep and Shrinkage of Concrete, Z. P. Bažant and I. Carol, eds., Spon, London, 859–872.
Prestressed Concrete Institute (PCI). (2003). Bridge design manual, Chapter 8, Chicago.
Recupero, A., and Granata, M. F. (2013). “A mixed approach for the determination of initial cable forces in cable-stayed bridges and the parameters variability.” Baltic J. Road Bridge Eng., in press.
Sassone, M., Bigaran, D., and Casalegno, C. (2007), “Numerical approach to viscoelastic analysis of concrete structures using equilibrium and FEM.” Structural implication of shrinkage and creep of concrete, N. J. Gardner and M. A. Chiorino, eds., American Concrete Institute (ACI), Farmington Hills, MI, 21–36.
Sassone, M., and Casalegno, C. (2012). “Evaluation of the structural response to the time-dependent behaviour of concrete. Part 2—A general computational approach.” Indian Concr. J., 86(12), 39–51.
Tadros, M. K., Ghali, A., and Dilger, W. H. (1975). “Time-dependent prestress loss and deflection in prestress concrete members.” PCI J., 20(3), 86–98.
Trost, H. (1967a). “Auswirkungen des Superpositionsprinzips auf Kriech und Relaxationsprobleme bei Beton und Spannbeton.” Beton- Stahlbetonbau, 62(10), 230–238.
Trost, H. (1967b). “Auswirkungen des Superpositionsprinzips auf Kriech und Relaxationsprobleme bei Beton und Spannbeton.” Beton- Stahlbetonbau, 62(11), 261–269.
Yu, Q., Bažant, Z. P., and Wendner, R. (2012). “Improved algorithm for efficient and realistic creep analysis of large creep-sensitive concrete structures.” ACI Struct. J., 109(5), 665–675.
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Published In
Journal of Bridge Engineering
Volume 18 • Issue 12 • December 2013
Pages: 1281 - 1297
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 28, 2012
Accepted: Feb 12, 2013
Published online: Feb 14, 2013
Published in print: Dec 1, 2013
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