Long-Term Behavior of Continuous Precast Concrete Girder Bridge Model
Publication: Journal of Bridge Engineering
Volume 5, Issue 1
Abstract
Continuous concrete box girder bridges composed of precast reinforced and prestressed concrete beams with a U cross section and a cast-in-place top slab are frequently used for medium spans due to their competitiveness. The service behavior of such bridges is very much influenced by their segmental construction, due to time-dependent materials behavior that makes it difficult to accurately predict the stresses, strains, and deflections at long term. A 1:2 scale model of a two-span continuous bridge was tested in order to study its behavior during the construction process and under permanent loads. Time-dependent concrete properties, as well as support reactions, deflections, and strains in concrete and steel, were measured for 500 days. Important time-dependent redistributions of stresses and internal forces throughout the bridge were also measured. The test results were compared with analytical predictions obtained by means of a numerical model developed for the nonlinear and time-dependent analysis of segmentally erected, reinforced and prestressed concrete structures. Generally good agreement was obtained, showing the adequacy of the model to reproduce the structural effects of complex interactive time-dependent phenomena.
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References
1.
Abbas, S., and Scordelis, A. C. (1993). “Nonlinear geometric, material and time-dependent analysis of segmentally erected three-dimensional cable stayed bridges.” Rep. UCB/SEMM-93/09, University of California at Berkeley, Calif.
2.
Cruz, P. J. S., Marí, A. R., and Roca, P. (1998). “Nonlinear time-dependent analysis of segmentally constructed structures.”J. Struct. Engrg., ASCE, 124(3), 278–287.
3.
Elbadry, M. M. ( 1988). “Serviceability of reinforced concrete structures,” PhD thesis, University of Calgary, Canada.
4.
Kang, Y. (1989). “SPCFRAME: Computer program for nonlinear segmental analysis of planar prestressed concrete frames.” Rep. UCB/SEMN-89-07, University of California at Berkeley, Calif.
5.
Krístek, V., and Bazánt, Z. P. (1987). “Shear lag effect and uncertainty in concrete box girder creep.”J. Struct. Engrg., ASCE, 113(3), 557–574.
6.
Larrard, F., and Aïtcin, P. C. (1993). “Apparent strength retrogression of silica fume concrete.” ACI Mat. J., 90(6), 581–585.
7.
Marí, A. R. (1984). “Nonlinear geometric, material and time dependent analysis of three dimensional reinforced and prestressed concrete frames.” Rep. No. 1, UCB/SESM-84/12, University of California, Berkeley, Calif.
8.
Marí, A. R. (1998). “Nonlinear and time dependent analysis of segmentally erected three dimensional concrete frames.” Res. Rep. Dept. of Constr. Engrg., Universitat Politecnica de Catalunya, Barcelona, Spain.
9.
Marí, A. R., Montaner, J., and Valero, I. (1996). “Evaluación de estados tensodeformacionales y flechas en puentes isostáticos prefabricados de hormigón pretensado.” Hormigón y Acero, No. 202, 25–58 (in Spanish).
10.
Murcia, J., and Herkenhoff, L. (1994). “Análisis en el tiempo de puentes continuos de hormigón construidos a partir de elementos prefabricados.” Hormigón y Acero, No. 192, 55–71 (in Spanish).
11.
Roca, P., and Marí, A. R. (1993). “Numerical treatment of prestressing tendons in the nonlinear analysis of prestressed concrete structures.” Comp. and Struct., 46(5), 905–916.
12.
Valdés, M. ( 1997). “Comportamiento durante construcción y bajo cargas permanentes de puentes continuos prefabricados de hormigón,” PhD thesis, Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos, Barcelona, Spain.
13.
Vitek, J. L. (1997). “Long-term deflections of large prestressed concrete bridges.” Bull. No. 235, Serviceability Models, Progress Rep., Comité Euro-International du Béton (CEB), Lausanne, Switzerland.
14.
Vitek, J. L. (1997). “Selected monitored bridges.” Bull. No. 235, Serviceability Models, Progress Rep., Comité Euro-International du Béton (CEB), Lausanne, Switzerland.
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Received: Jun 2, 1998
Published online: Feb 1, 2000
Published in print: Feb 2000
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