Curved, precast, pretensioned concrete I-girder bridges

摘要

>The use of curved, precast, pretensioned concrete girders as an alternative to curved post-tensioned concrete girders and curved steel girders may have many advantages. A feasibility study has shown that the pretensioned concrete system is more cost effective than the other two. Many bridge designers have gradually recognized this trend. This paper summarizes a review of the current practice of horizontally curved bridge construction. A 1/10-scale, curved, precast, pretensioned concrete beam was fabricated in the laboratory to illustrate the feasibility of fabrication in a precast concrete plant. A cost analysis was conducted to compare the estimated cost of a curved, precast, pretensioned concrete I-girder with that of a curved, precast, post-tensioned concrete I- girder. The results showed that the pretensioned concrete system has the potential to become the most cost-effective system for curved bridge construction.>References>1. American Association of State Highway and Transportation Officials (AASHTO). LRFD Bridge Design Specifications: 2004 and 2005 Interim Revisions. 3rd ed. Washington, DC: AASHTO. >2. Barnoff, R. M., G. Nagle, M. G. Suarez, L. F. Geschwindner, H. W. Merz, and H. H. West. 1984. Design, Fabrication, and Erection of a Curved, Prestressed Concrete Bridge with Continuous Girders.  Transportation Research Record, No. 950, V. 1: pp. 136-140. >3. Endicott, W. A. 2005. A Fast Learning Curve. Ascent (summer): pp. 36-49. >4. Sun, C., S. A. Hennessey, M. S. Ahlman, and M. K. Tadros. 2007. target="_blank" title="Value Engineering Arbor Road Bridge with Curved Precast Concrete Girders" href="http://dx.doi.org/10.15554/pcij.03012007.94.106 ">Value Engineering Arbor Road Bridge with Curved Precast Concrete Girders. PCI Journal, V. 52, No. 2 (March-April): pp. 94-106. >5. McManus, P. F., G. A. Nasir, and C. G. Culver. 1969. Horizontally Curved Steel I-Girder State-of-the-Art Analysis Methods. Journal of the Structural Division, V. 95, No. ST5 (May): pp. 853-870. >6. Zureick, A., and R. Naqib. 1999. target="_blank" title="Horizontally Curved Steel I-Girder State-of-the-Art Analysis Methods" href=" http://dx.doi.org/10.1061/(asce)1084-0702(1999)4:1(38) ">Horizontally Curved Steel I-Girder State-of-the-Art Analysis Methods. Journal of Bridge Engineering, V. 4, No. 1 (February): pp. 38-47. >7. Bares, R., and C. Massonnet. 1968. Analysis of Beam Grids and Orthotropic Plates by the Guyon-Massonnet- Bares Method. London, UK: Crosby Lockwood & Son Ltd. >8. Rowe, R. E. 1962. Concrete Bridge Design. New York, NY: John Wiley & Son Inc. >9. Jaeger, L. G., and B. Bakht. 1982. target="_blank" title="The Grillage Analogy in Bridge Analysis" href="http://dx.doi.org/10.1139/l82-025 ">The Grillage Analogy in Bridge Analysis. Canadian Journal of Civil Engineering, V. 4: pp. 224-235. >10. Hambly, E. C. 1976. Bridge Deck Behavior. New York, NY: John Wiley & Son Inc. >11. West, R. 1973. C&CA/CIRIA Recommendations on the Use of Grillage Analysis for Slab and Pseudo-slab Bridge Decks. Publication 46.017. London, UK: Cement and Concrete Association. >12. Zokaie, T., T. A. Osterkamp, and R. A. Imbsen. 1991. Distribution of Wheel Loads on Highway Bridges. National Cooperative Highway Research Program  (NCHRP) report 12-26.>13. Heins, C. P. 1976. Applied Plate Theory for the Engineer. Lexington, MA: Lexington Books, D. C. Heath & Co. >14. Bell, L. C., and C. P. Heins. 1970. Analysis of Curved Girder Bridges. Journal of the Structural Division, V. 96, No. ST8 (August): pp. 1657-1673. >15. Meyer, C., and A. C. Scordelis. 1971. Analysis of Curved Folded Plate Structures. Journal of the Structural Division, V. 97, No. ST10 (October): pp. 2459-2479. >16. Cheung, Y. K. 1976. target="_blank" title="Finite Strip Method in Structural Analysis." href="http://dx.doi.org/10.1016/b978-0-08-018308-4.5