Strengthening of Continuous Composite Bridges
Publication: Journal of Structural Engineering
Volume 116, Issue 9
Abstract
The purpose of this first phase of a continuing research program is to examine the potential for strengthening continuous composite bridges by post‐tensioning. Testing of a one‐third scale bridge model and finite element analysis are used to determine the effects of various straight‐tendon posttensioning schemes. Because of both longitudinal and transverse distribution, the effects of posttensioning are complex. When asymmetrical posttensioning arrangements are applied to the bridge, the resulting stresses add to the dead load stresses in some regions of the model bridge. Symmetrical posttensioning of negative moment regions results in smaller stress reductions than symmetrical posttensioning of positive moment regions. Symmetrical posttensioning of positive moment regions has significant beneficial effects in both negative and positive moment regions. Vertical loads applied to the posttensioned model bridge either increase or decrease tendon forces, depending on the positions of the loads and tendons. Testing and analysis indicate that symmetrical posttensioning could improve service load stresses in continuous composite bridges.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Daoud, F. K. (1987). “Experimental strengthening of a three‐span composite model bridge by post‐tensioning.” Thesis presented to Iowa State University, at Ames, Iowa, in partial fulfillment of the requirements for the degree of Master of Science.
2.
Dunker, K. F., Klaiber, F. W., and Sanders, W. W., Jr. (1985a). “Design manual for strengthening single‐span composite bridges by post‐tensioning.” Final Report—Part III, ERI Project 1536, ISU‐ERI‐Ames‐85229, Engrg. Res. Inst., Iowa State Univ., Ames, Iowa.
3.
Dunker, K. F., et al. (1985b). “Strengthening of existing single‐span steel‐beam and concrete deck bridges.” Final Report—Part II, ERI Project 1536, ISU‐ERI‐Ames‐85231, Engrg. Res. Inst., Iowa State Univ., Ames, Iowa.
4.
Dunker, K. F., et al. (1987). “Strengthening of existing continuous composite bridges.” Final Report, ERI Project 1846, ISU‐ERI‐Ames‐88007, Engrg. Res. Inst., Iowa State Univ., Ames, Iowa.
5.
Dunker, K. F., Klaiber, F. W., and Sanders, W. W., Jr. (1986). “Post‐tensioning distribution in composite bridges.” J. Struct. Engrg., ASCE, 112(11), 2540–2553.
6.
Kennedy, J. B., and Grace, N. F. (1982). “Prestressed decks in continuous composite bridges.” J. Struct. Div., ASCE, 108(11), 2394–2410.
7.
Kennedy, J. B., Grace, N. F., and Soliman, M. (1989). “Welded versus bolted‐steel I‐diaphragms in composite bridges.” J. Struct. Engrg., ASCE, 115(2), 417–432.
8.
Klaiber, F. W., et al. (1983). “Strengthening of existing single span steel beam and concrete deck bridges.” Final Report—Part I, ERI Project 1536, ISU‐ERI‐Ames‐83185, Engrg. Res. Inst., Iowa State Univ., Ames, Iowa.
9.
Klaiber, F. W., Dunker, K. F., and Sanders, W. W., Jr. (1981). “Feasibility study of strengthening existing single span steel beam concrete deck bridges.” Final Report, ERI Project 1460, ISU‐ERI‐Ames‐81251, Engrg. Res. Inst., Iowa State Univ., Ames, Iowa.
10.
Klaiber, F. W., Dunker, K. F., and Sanders, W. W., Jr. (1982). “Strengthening of single‐span steel‐beam bridges.” J. Struct. Div., ASCE, 108(12), 2766–2780.
11.
Klaiber, F. W., et al. (1987). “Methods of strengthening existing highway bridges.” Nat. Cooperative Highway Res. Program Rept. 293, Transp. Res. Bd., Nat. Res. Council, Washington, D.C.
12.
Manual of maintenance inspection of bridges 1978. (1978). Amer. Assoc. of State Highway and Transp. Officials, Washington, D.C.
13.
Standard specifications for highway bridges. (1983). 13th Ed., Amer. Assoc. of State Highway and Transp. Officials, Washington, D.C.
14.
Wiley, W. E. (1988). “Post‐tensioning of composite T‐beams subjected to negative moment.” Thesis presented to Iowa State University, at Ames, Iowa, in partial fulfillment of the requirements for the degree of Master of Science.
15.
Wiley, W. E., Klaiber, F. W., and Dunker, K. F. (1989). “Behavior of composite steel bridge beams subjected to various post‐tensioning schemes.” Presented at Annual Meeting, Transp. Res. Bd., Washington, D.C.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 116 • Issue 9 • September 1990
Pages: 2464 - 2480
Copyright
Copyright © 1990 ASCE.
History
Published online: Sep 1, 1990
Published in print: Sep 1990
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.