鉄筋コンクリート曲げ材の最小鉄筋比に関する研究

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書誌事項

タイトル別名
  • ON THE MINIMUM AMOUNT OF TENSILE REINFORCEMENT ON REINFORCED CONCRETE FLEXURAL MEMBER
  • テッキン コンクリート マゲ ザイ ノ サイショウ テッキンヒ ニ カンスル ケンキュウ

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抄録

In the reinforced concrete flexural member, the stress distribution over the cracked section becomes unstable just after occuring the flexural crack and the resistant moment decreases temporarily until reaching the stable state. Especially, in a case of extremely smaller amount of tensil reinforcement as well as the use of reinforcement having extremely weak yield strength in comparison with the concrete strength, the flexural failure moment is mathematically smaller than the initial cracking moment and as a result the member suddenly fails in flexure just as the applied load reaches the initial cracking strength. Of course, such a sudden flexural failure should be avoided in the design. In this paper, from such concept the minimum amount or the minimum yielding strength of the tensile reinforcement is discussed theoretically in correspondence to the variable combinations of steel yielding strength and concrete compressive strength.

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