Joint KDOT-MoDOT: Evaluation of FRP Repair Method for Cracked PC Bridge Members |
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Status | |
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Sequential Number | R63 |
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Matching Research Agency | Missouri Department of Transportation (MoDOT) |
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Principal Investigator | Antonio Nanni
Jones Professor of Civil Engineering
Missouri University of Science and Technology
224 ERL
Rolla, MO, 65402 | | p | (573) 341-4497 | | f | (573) 341-6215 | | nanni@mst.edu |
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Student Involvement | One (1) M.S. student |
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Project Objective | The aim of this project is to evaluate methods for upgrading PC bridge girders using FRP composites. The project is a collaborative effort between MODOT and KDOT and is performed at two universities, namely: KSU and UMR. A Phase I consisting of the testing of saw-cut double-T members (that were removed from a damaged bridge in Graham County, KS) is under completion. This proposal consists of the Phase II portion of the research program. In particular, UMR will undertake research in the area of shear strengthening, while KSU will concentrate on flexural strengthening and fatigue characterization. Both universities will use the same PC specimens. |
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Project Abstract | The aim of this project is to evaluate methods for upgrading PC bridge girders using FRP composites. The project is a collaborative effort between MODOT and KDOT and is performed at two universities, namely: KSU and UMR. A Phase I consisting of the testing of saw-cut double-T members (that were removed from a damaged bridge in Graham County, KS) is under completion. This proposal consists of the Phase II portion of the research program. In particular, UMR will undertake research in the area of shear strengthening, while KSU will concentrate on flexural strengthening and fatigue characterization. Both universities will use the same PC specimens. This collaborative effort will allow DOT's and universities to leverage their individual resources and tackle problems at a regional scale in order to maximize impact and use of resources.
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Task Description | Strengthening will be performed with three different techniques, namely: near surface mounted CFRP rods, NSM CFRP tapes, and internal CFRP dowels. Specimen 13 is the base line for UMR work. It will be strengthened similarly to specimen 8 at KSU using pre-cured laminates in lieu of laminates installed by manual lay-up. |
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Anticipated Benefits | The proposed project will lead to a regional evaluation of strengthening methods for PC members both in flexure and shear. If the technology is proved feasible, the impact to the states of Missouri and Kansas could be very significant. |
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Modal Orientation | N/A |
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Milestones | | Project Start Date: | 04/01/2002 | | Project End Date: | 03/30/2003 |
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Relationship to other Research/Projects | N/A |
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Technology Transfer Activities | This project provides a significant avenue for technology transfer in that two universities for two different states (Kansas and Missouri) will be working closely together. At the conclusion of the project a final report will be prepared and submitted to KDOT. In addition, the findings will be presented at a professional conference (PCI, TRB or similar). |
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Transportation Research Board Keywords | FRP, strengthening, repair, prestressed and concrete girders |
