鉄筋コンクリート部材におけるひびわれ発生域の抵抗機構に関する実験研究 : ひびわれ開閉モデルの検証

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The results of basic experimental studies for opening and closing behavior of a crack in RC members are reported. The preceding paper reported the influence of the concrete cover, crack spacing, a diameter and properties of reinforcement and the shape of ribs of a reinforcement on the opening and closing behavior of a crack. In this paper, the factors in the specimens are concrete strength, the number and the spacing of longitudinal reinforcement and a lateral reinforcement ratio. The objectives in this research are to clarify the opening and closing behavior of a crack empirically and modify the crack model that was proposed in the preceding paper. An axial force was applied to the prism type specimens in order to represent the constant moment region which appears between tensile cracks. Eighteen prism type specimens and four beem type specimens were tested. The following facts were clarified. 1) The difference in the shape of the hysteresis loop by these factors in this paper was not observed. 2) The relation between the axial force and crack width that was obtained from the experiments including the preceding paper was modeled in numerical formulae. The proposed model considers a complex element of the reinforced concrete including a crack and bond action. This model represent the influence of the reduction of the bond action and the local contact effect of a crack. 3) The opening and closing behavior of a crack in the RC beem under reverced cyclic loading was represented very well by the proposed model. Therefore, this model was confirmed as the suitable analytical model for the complex elements of the cracking area of RC members.
社団法人日本建築学会の論文
1990-03-25

鉄筋コンクリート部材におけるひびわれ発生域の抵抗機構に関する実験研究 : ひびわれ開閉モデルの検証

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