Paper number 873


Ayman S. Mosallam, Ph.D., P.E.

Division of Engineering
California State University, Fullerton, CA 92834, USA

Summary The paper introduces a new application of polymer composites in repair and rehabilitation of reinforced concrete (R/C) frame connections. In this pilot study, a total of six half-scale reversal cyclic tests were preformed. The tests were conducted on half-scale specimens simulating interior beam-to-column sub-assemblages of a typical R/C structure. Two connection specimens were used as control specimens and were tested to failure. These two "repairable" damaged specimens were re-tested under a similar loading regime after being repaired with both epoxy injection and carbon/epoxy & E-glass/epoxy quasi-isotropic laminates. To investigate the performance of the composite systems as retrofit systems, two other half-scale tests were conducted on undamaged specimens strengthened with both E-glass/epoxy quasi-isotropic laminates. Test results indicated that the use of composite overlays has contributed in an appreciable increase in both stiffness and strength of these connections. In addition, the ductility of the repaired connection specimens has been increased up to 42% as compared to the control specimens. Discussion on the advantages and disadvantages of using E-glass/epoxy vs. carbon epoxy laminates is also presented.
Keywords seismic repair, reinforced concrete, moment connections, construction.

Theme : Reinforcement and repair in Civil Engineering and Building Construction

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