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Fiber-Reinforced Plastic Jackets for Ductility Enhancement of Reinforced Concrete Bridge Columns with Poor Lap-Splice Detailing |
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| Authors: | Medhat A Haroun Hussein M Elsanadedy |
| Affiliation: | 1Dean and AGIP Professor, School of Sciences and Engineering, The American Univ. in Cairo, Egypt, and Professor Emeritus, Univ. of California, Irvine, CA 92697. 2Assistant Professor, Dept. of Civil Engineering, Helwan Univ., Cairo, Egypt; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697. |
| Abstract: | This paper presents an inclusive testing program conducted on scaled models of reinforced concrete (RC) bridge columns with insufficient lap-splice length. Thirteen half-scale circular and square column samples were tested in flexure under lateral cyclic loading. Three columns were tested in the as-built configuration whereas ten samples were tested after being retrofitted with different composite-jacket systems. A brittle failure was observed in the as-built samples due to bond deterioration of the lap-spliced longitudinal reinforcement. The jacketed circular columns demonstrated a significant improvement in their cyclic performance. Yet, tests conducted on square jacketed columns showed a limited improvement in clamping on the lap-splice region and for enhancing the ductility of the column. |
| Keywords: | Ductility Concrete columns Bridges Cyclic loads |