ULTIMATE SHEAR STRENGTH OF R/C MEMBERS WITH BIAXIAL SECTIONS

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  • 二軸対称断面の鉄筋コンクリート部材の終局せん断耐力
  • 2軸対称断面の鉄筋コンクリート部材の終局せん断耐力
  • 2ジク タイショウ ダンメン ノ テッキン コンクリート ブザイ ノ シュウキ

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In this paper, the analytical method to estimate for ultimate shear strength of reinforced concrete members with biaxial sections, circular and diamond section, is proposed by authors, and is based on a plastic analysis. 2) On the analytical method, the divided rectangular sections have been cuted out between the longitudinal bar in biaxial section, and the amount of the reinforced bar has been distributed in order of the divided rectangular sections having large area. The shear strength of the divided rectangular section has been calculated by the extend addition strength theorem, and the ultimate shear strength of R/C members with biaxial sections has been calculated to add up to each of the shear strength of the divided rectangular sections. The parabolic distribution of shear stress occurred in circular section is estimated by the analytical method, and it is evident that this distribution of shear stress in circular column transforms according to the amount of reinforced bar and longitudinal reinforcement. This analytical method can not be adopted for design method because of complicated calculation. The design method must be simplified, and we have often used to the approximate method which shear stress occurred in circular section is constantly distributed, conventionally. Therefor, the reliability of both the analytical method and the approximate method is examined. It is evident that the solutions calculated by both the analytical method and the approximate method correspond well with the experimental results, respectively, and that the approximate method is more effective on design method.

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