Segmental and Conventional Precast Prestressed Concrete I-Bridge Girders
Publication: Journal of Bridge Engineering
Volume 2, Issue 3
Abstract
Conventional precast I-girder bridge systems are widely used in North America for short and medium spans, up to 45 m. Spliced standard precast I-girder segments made continuous by longitudinal posttensioning have been used for spans of up to 75 m, making them far more competitive with the steel plate girder and concrete box girder alternatives. The span and/or girder spacing capabilities of the standard I-sections of Nebraska University, Florida, American Association of State Highway and Transportation Officials-Precast/Prestressed Concrete Institute (AASHTO-PCI), and Canadian Prestressed Concrete Institute (CPCI) are determined for both spliced posttensioned and conventional pretensioned girder systems. This investigation shows that the Florida and Nebraska University I-sections are the most efficient girders for spliced posttensioned and conventional pretensioned bridges, respectively. Using a nonlinear optimization program, the optimum girder shape is found to be a bulb-tee for spliced posttensioned girders and a quasi-symmetrical I-section for conventional pretensioned girders. A new set of five I-sections that achieve a balanced efficiency for both spliced posttensioned and conventional pretensioned bridge girder systems are proposed. Three examples of alternative preliminary bridge designs using both the existing standard and the newly proposed I-sections illustrate the practicality of the presented results.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Abdelkarim, A. M., and Tadros, M. K. (1993). “State-of-the-art of precast/prestressed concrete spliced I-girder bridges.”PCI Spec. Publ., PCI Inst., Chicago, Ill.
2.
Anderson, A. R.(1973). “Stretched-out AASHTO-PCI beams types III and IV for longer span highway bridges.”PCI J., 18(5), 32–49.
3.
Brook, A., Kendrick, D., and Meeraus, A. (1988). GAMS—General Algebraic Modeling System: a user's guide. Scientific Press, Redwood City, Calif.
4.
Cohn, M. Z., and Lounis, Z.(1994). “Optimal design of structural concrete bridge systems.”J. Struct. Engrg., ASCE, 120(9), 2653–2674.
5.
Dunker, K. F., and Rabbat, B. G.(1992). “Performance of prestressed concrete highway bridges in the United States—the first 40 years.”PCI J., 37(3), 48–64.
6.
Garcia, A. M.(1993). “Florida's long span bridges: new forms, new horizons.”PCI J., 38(4), 34–49.
7.
Geren, K. L., and Tadros, M. K.(1994). “The NU precast/prestressed concrete bridge I-girder series.”PCI J., 39(3), 26–39.
8.
Guide specifications for design and construction of segmental concrete bridges. (1989). Am. Assn. of State Hwy. and Transp. Officials, Washington, D.C.
9.
Harvey, D. I. (1986). “Spliced segmental precast concrete bridge using staged post-tensioning.”Concrete in transportation, Proc., ACI SP-93, Am. Concrete Inst., Detroit, Mich., 721–736.
10.
Laszlo, G., and Imper, R. R.(1987). “Handling and shipping of long span bridge beams.”PCI J., 32(6), 86–101.
11.
Lounis, Z., and Cohn, M. Z.(1993a). “Multiobjective optimization of prestressed concrete structures.”J. Struct. Engrg., ASCE, 119(3), 794–808.
12.
Lounis, Z., and Cohn, M. Z.(1993b). “Optimization of precast prestressed concrete bridge girder systems.”PCI J., 38(4), 60–78.
13.
Marshall, S. L., and Pelkey, R. E. (1986). “Production, transportation and installation of spliced prestressed concrete I-girders for the Annacis Channel East Bridge.”Concrete in transportation, Proc., ACI SP-93, Am. Concrete Inst., Detroit, Mich., 737–768.
14.
Mast, R. F.(1993). “Lateral stability of long prestressed concrete beams—part 2.”PCI J., 38(1), 70–88.
15.
Murtagh, B. A., and Saunders, M. A. (1980). “MINOS/augmented-user's manual.”Tech. Rep. SOL80-14, Dept. of Op. Res., Stanford Univ., Stanford, Calif.
16.
Ontario highway bridge design code, 3rd Ed. (1992). Ministry of Transp., Downsview, Ontario, Canada.
17.
Rabbat, B. G., and Russell, H. G.(1982). “Optimized sections for pretensioned concrete bridge girders in the United States.”PCI J., 27(4), 88–104.
18.
Standard specifications for highway bridges: LRFD bridge design, 1st Ed. (1994). Am. Assn. of State Hwy. and Transp. Officials, Washington, D.C.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 2 • Issue 3 • August 1997
Pages: 73 - 82
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Aug 1, 1997
Published in print: Aug 1997
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.