Skip to Navigation
Auburn University Homepage
A-Z Index | Map | People Finder
Auburn University Logo
Electronic Theses and Dissertations
Skip to Main Content
Main Navigation 
  • AUETD Home
  • Graduate School
JavaScript is disabled for your browser. Some features of this site may not work without it.
View Item 
  •   AUETD Home
  • View Item
  •   AUETD Home
  • View Item

Near-Surface Mounted, Fiber-Reinforced Polymer Strips for Negative-Moment Strengthening of Concrete Bridges—Design Methodology

View/Open
Extracted text (385.0Kb)
Jeffrey Kyle Alexy thesis.pdf (8.121Mb)
Date
2009-05-12
Author
Alexy, Jeffrey
Type of Degree
thesis
Department
Civil Engineering
Metadata
Show full item record
Abstract
A bridge near Letohatchee, Alabama, was found to be deficient for certain types of truck loadings. Fiber-reinforced polymer (FRP) strips were selected to use in the strengthening scheme. Various models and code recommendations were studied and compared against existing experimental results to determine the most effective models for FRP-strengthened members. The models were divided into three groups: plate-end (PE) debonding models for near-surface mounted (NSM) FRP, intermediate-crack (IC) debonding models for externally-bonded (EB) FRP, and IC-debonding models for NSM FRP. None of the three PE-debonding models correlated well with the experimental results. Four of the six IC-debonding models for EB were relatively accurate for the test data. All five of the IC-debonding models for NSM produced mostly conservative results, with three models being relatively accurate. These three models—ACI 440 (2008), Standards Australia (2008), and Seracino et al. (2007a)—were used in the proposed strengthening scheme to determine the amount of NSM FRP the Letohatchee bridge needed. To verify this proposed design and to further examine the behavior of NSM-strengthened concrete members, a laboratory testing program was proposed. One of the main reasons for a laboratory testing program is that the published experimental test configurations do not match the Letohatchee bridge very well. The reinforcement ratios for the actual bridge are lower than the tests, and the NSM test specimens were not cracked prior to FRP strengthening. In the proposed testing program, the effects of the amounts of FRP and steel, the concrete compressive strength, and the cross-sectional shape were analyzed.
Files
Name:
Jeffrey Kyle Alexy thesis.pdf.txt  
Size:
385.0Kb
Name:
Jeffrey Kyle Alexy thesis.pdf  
Size:
8.121Mb
URI
http://hdl.handle.net/10415/1736

Browse

All of AUETDBy Issue DateAuthor / AdvisorTitlesDepartments

My Account

Login

Auburn University Libraries | 231 Mell Street | Auburn, Alabama 36849 | (334) 844-4500 or (800) 446-0387 |

 

Auburn University |Auburn, Alabama 36849 |(334) 844-4000 |

Website Feedback |Privacy |Copyright ©