構造設計・設計法

[2003] INVESTIGATION ON THE SHEAR OF REINFORCED CONCRETE HAUNCHED BEAMS WITH SHEAR REINFORCEMENT

座長(土木)：長谷川俊昭
座長(建築)：勅使川原正臣
講演者：侯陳偉, 松本浩嗣, 二羽淳一郎 (東京工業大学)

キーワード：angle of diagonal shear cracks, arch action, crack pattern, RC haunched beam, アーチ機構, ハンチを有するRCはり, ひび割れパターン, 斜めひび割れ角度

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This paper presents the evaluation of shear carried by stirrups in reinforced concrete haunched beams (RCHBs) with stirrups. Three RCHBs with stirrups and one RCHB without stirrups were tested. The results demonstrated that bending positions of tensile rebars near the loading point highly influenced crack propagations and shear capacities in RCHBs with stirrups. It was due to different contributions of arch action and stirrups in the shear resistance. The calculated shear carried by stirrups with the angle of diagonal shear cracks showed good correspondence with the experimental results.