Field monitoring of positive moment continuity detail in a skewed prestressed concrete bulb-tee girder bridge

摘要

>This paper presents the results from a recently completed field study in Louisiana investigating the performance of a skewed prestressed concrete bulb-tee girder bridge made continuous. The bridge is part of the design-build John James Audubon Project that connects the cities of Saint Francisville and New Roads across the Mississippi River in Louisiana. A 96-chanel monitoring system was designed and installed prior to bridge construction. The bridge used the positive moment continuity detail recommended in National Cooperative Highway Research Program (NCHRP) report 519. The Louisiana Department of Transportation and Development chose to monitor the skewed segment with bulb-tee girders because neither the skewness nor the bulb tee section was within the scope of the experimental program covered in project 12-53 that produced NCHRP report 519. This paper presents details of the monitoring system developed for this project, which has been in service for more than two years. Temperature, strain, rotation, and elongation readings are also presented. The bridge continuity isassessed based on the acquired postprocessed readings. Conclusions, lessons learned, and recommendations for future research are also presented.>References>1. Okeil, A. M., and A. K. El-Safty. 2005. href="http://dx.doi.org/10.1061/(asce)1084-0680(2005)10:4(229) " title="a€?Partial Continuity in Bridge Girders with Jointless Decks.a€?" target="_blank">a€?Partial Continuity in Bridge Girders with Jointless Decks.a€? Practice Periodical on Structural Design and Construction 10 (4): 229-238. >2. Caner, A., and P. Zia. 1998. href="http://dx.doi.org/10.15554/pcij.05011998.68.80 " title="a€?Behavior and Design of Link Slabs for Jointless Bridge Decks.a€?" target="_blank">a€?Behavior and Design of Link Slabs for Jointless Bridge Decks.a€? PCI Journal 43 (3): 68-80. >3. Wing, K. M., and M. J. Kowalsky. 2005. href="http://dx.doi.org/10.1061/(asce)1084-0702(2005)10:3(331) " title="a€?Behavior, Analysis, and Design of an Instrumented Link Slab Bridge.a€?" target="_blank">a€?Behavior, Analysis, and Design of an Instrumented Link Slab Bridge.a€? Journal of Bridge Engineering 10 (3): 331-344. >4. Alampalli, S., and A. P. Yannotti. 1998. href=" http://dx.doi.org/10.3141/1624-01 " title="a€?In-Service Performance of Integral Bridges and Jointless Decks.a€? " target="_blank">a€?In-Service Performance of Integral Bridges and Jointless Decks.a€?  Transportation Research Record 1624: 1-7.>5. Thippeswamy, H. K., H. V. S. GangaRao, and J. M. Franco. 2002. target="_blank" title="a€?Performance Evaluation of Jointless  Bridges.a€?" href="er IDs: 10.1061/(ASCE)1084-0702(2002)7:5(276) http://dx.doi.org/10.1061/(asce)1084-0702(2002)7:5(276) ">a€?Performance Evaluation of Jointless  Bridges.a€? Journal of Bridge Engineering 7 (5):276-289. >6. Demartini, C. J., and R. J. Haywood. 1991. a€?Repair of the Southern Approach to the Story Bridge by  Elimination of the Contraction Joints.a€? In Proceedingsof the Austroads Bridges Conference, pp.  357-369. Brisbane, Australia: AUSTROADS. >7. Pierce, P. 1991. a€?Jointless Redecking.a€? Civil Engineering 61 (9): 60-64. >8. Burke, M. P., Jr. 1994. a€?Semi Integral Bridges: Movements and Forces.a€? Transportation Research Record 1460: 1-7. >9. Siros, K. A., and C. C. Spyrakos. 1995. a€?Creep  Analysis of Hybrid Integral Bridges.a€? Transportation Research Record 1476: 147-154.>10. Oesterle, R. G., J. D. Glikin, and S. C. Larson. 1989. a€?Design of Precast Prestressed Bridge Girders Made  Continuous.a€? National Cooperative Highway Research Program report 322. Washington,  DC: TRB (Transportation  Research Board).>11. Miller, R. A., R. Castrodale, A. Mirmiran, and M. Hastak. 2004. a€?Connection of Simple-Span Precast  Concrete Girders for Continuity.a€? NCHRP report 519. Washington, DC: TRB