Abstract
This article reports on a laboratory study undertaken to investigate the flexural behavior of full-scale, damaged prestressed concrete (PC) bridge girders upgraded with externally bonded carbon fiber-reinforced polymer (CFRP) laminates. The study include test on three beams: one was used as the control beam and the other two, damaged by removing the concrete cover and by cutting two and four strands, respectively, were repaired with CFRP laminates. The authors conclude that the upgrade technique used is structurally efficient in providing the damaged beams with stiffness and strength very close to that of the original undamaged beam. They discuss analytical predictions compared to the test results in terms of flexural capacity, deflections, strains, and failure modes. The authors reiterate that the use of CFRP laminates can allow damaged PC girders to recover their original flexural capacity and stiffness.
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