Performance Of Precast Concrete Bridge Girders With Externally Bonded Anchored Cfrp

Download or read book Performance of Precast Concrete Bridge Girders with Externally Bonded Anchored CFRP written by Tariq Aljaafreh and published by . This book was released on 2019 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Repair with Carbon Fiber Reinforced Polymer (CFRP) has become a topic of great interest to engineers in the last two decades. Fiber Reinforced Polymer (FRP)is considered as one of the most popular and practical solutions for strengthening and retrofitting civil structures, including bridge girders. Several past studies indicated that a significant increase in strength and stiffness can be achieved by using this technology; however, the major drawback of this repairing method is debonding. This research investigated the flexural behavior of simulated lateral damaged pre-stressed concrete bridge girders. Five Tx28 girders were tested up to failure, where 4 of them were simulated to be laterally damaged, and then they were strengthened with presaturated CFRP anchored with different types of anchors.Applied load, the strains along bottom side of the girder and across the height,and deflection at various points of the span data were collected. Test results showed that strengthening of laterally damaged prestressed concrete bridge girders with a presaturated CFRP layer can restore and exceed the original capacity of the damaged girders. The best performance was for the girder that was strengthened using a mechanical anchor with a 7.25% increase in the failure load compared to the control girder. The results also suggest places for anchors to prevent debonding propagation between CFRP and concrete, and mitigate premature debonding failures.