Vitreous porcelain enamel was recently introduced as an alternative coating system of steelrebar for improved corrosion resistance. The main objectives of this study were to characterize theeffect of enamel coating on the bond behavior of hooked bars in normal concrete anddevelop/recommend a design equation for the development length of enamel coated bars. To this end,sixteen beam-column joint specimens of varying configurations (12 with enamel coated reinforcementand 4 with regular reinforcement) were designed, cast, tested, and analyzed to understand theanchorage strength of reinforced concrete (RC) joints with enamel coated deformed bars. Test resultsclearly demonstrated that the anchorage strengths due to enamel coating significantly exceed theexpected performance of AASHTO LRFD Design Specifications. Based on the comparative study ofreinforced concrete (RC) beam-column specimens with and without enamel coating, a developmentlength design equation with a coating factor of 0.85 is recommended.
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