NUMERICAL ANALYSIS OF CRACK AND STRAIN BEHAVIOR OF RC SLAB IN STEEL-CONCRETE COMPOSITE GIRDER UNDER NEGATIVE BENDING

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  • 負曲げを受ける合成桁RC床版のひび割れ及び鉄筋ひずみ挙動の数値解析

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 The sophisticated numerical analysis method is required to simulate the strain behavior of the reinforcement and the crack width of the RC slab, although many researches are conducted on the cracking behavior of the RC slab in the composite girder under the negative bending. In this paper, the numerical analysis method is constructed to evaluate the strain behavior of the reinforcement and the crack width of the RC slab in the steel-concrete composite girder subjected to the negative bending. The analysis method using the rigid body spring model takes into account the imperfect composite action between the steel girder and the RC slab, the bond between the reinforcement and the concrete, and the shrinkage of the concrete. As a result, it is confirmed that the analysis method can simulate the crack and the strain behavior of RC slab quantitatively in the steel-concrete composite girder under the negative bending.

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