著者

六車 熙 岸本 茂規

出版者

一般社団法人日本建築学会

雑誌

日本建築学会論文報告集 (ISSN:03871185)

巻号頁・発行日

no.172, pp.1-6, 75, 1970-06-30

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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.