FUNDAMENTAL STUDY ON REDUCTION OF STEEL MAIN GIRDER REINFORCEMENT FOR RC SLAB REPLACEMENT UNDER HALF-WIDTH IN SERVICE CONSTRUCTION AND COMPOSITE ACTION BETWEEN SLAB DECK AND GIRDERS
Shunsuke KOBAYASHI, Takashi MATSUMOTO, Nobuhiro MITSUKAWA, Takashi YAMAGUCHI
Deteriorated RC slab deck of steel girder bridge is necessary to replace under half - width service construction for short time in Japan. Therefore it tends to replace composite RC deck to non-composite Precast PC deck, however, reinforcement of the main girders is required. In this study, frame analysis is conducted to confirm and to suggest a method to reduce reinforcement for girder. In addition, FEM analysis is conducted to evaluate the composite action between deck and girder. As a result of frame analysis, the amount of girder’s reinforcement could be reduced by taking cross-beam before combine the Precast PC deck in transverse direction. As a result of FEM analysis, the main girder with the Precast PC deck showed the incomplete composite action.