STUDY ON A CRACK FORMATION FOR COMPOSITE GIRDERS WITH NEGATIVE BENDING

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  • 負曲げを受ける合成桁のひび割れ挙動に関する研究
  • フマゲ オ ウケル ゴウセイ ケタ ノ ヒビワレ キョドウ ニ カンスル ケンキュウ

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Abstract

The continuous composite girders are mainly used for bridges. Cracking of concrete slab plays an important role near the intermediate supports where the negative bending moment occurs. Crack width is calculated by using strain of reinforcement and crack interval. In EUROCODE 4, the shaft tension model is developed for the analysis of negative bending behavior, and the crack width is calculated from the model. In this study, a new calculation technique for the estimation of crack width is proposed with the help of crack interval given by Japanese specification and strain of reinforcement determined by EC 4. The proposed technique is validated by comparison with experiments of girders with the negative bending moment.

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