鉄筋コンクリートばりのせん断疲労に関する研究

概要

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This investigation, envolving the testing specimens-each 6 specimens for steel and deformed steel bar under reinforced concrete beams-subjected to 2 concentrated loads in the state of a/d≒1 is to research for shear fatigue limits of reinforcebd concrete beams under repeated load. The authors have experimented for three years and finished the most of the investigation. They studied the mechanism of failure of rein forced concrete beams by the variations of strain and deflection, the state of cracks, failure load, and break down load, and described that the judicatory standards by a/d of the failured boundary may be applied to reinforced concrete beams under repeated load as well as static load. Additionary they described that the calculated values by the theoretical equations of deflection, bending moment and shearing focce agree well in the values of experiment. Tben, they defined that shear fatigue limits of steel and deformed steel bar under reinforced concrete beams are approximataly 45 percent for static failure load by these investigations and N-S curve.
山口大学の論文