せん断補強筋間隔がRC梁のせん断強度に及ぼす影響

概要

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Application of the plastic theory to reinforced concrete members has been successful in predicting their shear strengths. However, shear reinforcement has always been assumed to be distributed densely enough. The objective of this paper is to examine analytically the effects of sparseness of shear reinforcement on shear strength based on the upper bound theorem. We obtained the following results. (1) The shear strength of a member with sparse shear reinforcement can be 40 % lower than that with dense one even if the total amount of shear reinforcement is the same. (2) Shear reinforcement may not yield in the case that 0.2<p_ωσ_<ωy>/v_0σ_B<0.5 according to the sparseness of the reinforcement, where p_ω and σ_<ωy> are the ratio and the yield strength of shear reinforcement, and v_σ_B is the effective strength of concrete.
社団法人日本建築学会の論文
1992-07-30