[L39] せん断・ねじり

[L2110] SHEAR BEHAVIOR OF REINFORCED CONCRETE HAUNCHED BEAMS WITHOUT SHEAR REINFORCEMENT

侯 陳偉¹,松本 浩嗣¹,二羽 淳一郎¹ (1.東京工業大学)

キーワード：ハンチを有するRCはり,せん断耐力,ひび割れパターン,引張鉄筋の傾斜,アーチ作用

This study aims to clarify the shear resistance mechanism of reinforced concrete haunched beams (RCHBs) without shear reinforcement. Three RCHBs with different positions of haunched portion and one RCHB with thicker concrete cover in the mid span were tested. The results demonstrated that the positions of bends in the tensile rebars highly influenced the crack propagations which caused the variation in the shear capacities due to different contributions of arch action in the beams. The thicker concrete cover affected the crack pattern but almost no effect on the shear capacity.
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