This paper describes the results obtained from a pilot study on developing innovative techniques for seismic repair and rehab of steel beam-to-column welded moment connections. The research work included both full-scale connection tests, as well as finite element numerical modeling using ANSYS software. In this program, the feasibility of using a combination of polymer composites, high-strength adhesives, high-strength bolts and nuts, as well as conventional steel stiffeners was explored for repair/retrofit steel frame connections. The primary system that was investigated was in the form of attaching three-dimensional graphite/epoxy composite stiffening to the flanges of both beams and columns. Two details groups were tested; namely, composite stiffener with high-strength adhesives only, and bolted composite stiffeners.
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