構造設計・設計法Ⅱ

[2011] SHEAR BEHAVIOR OF TAPERED RC BEAMS WITH STIRRUPS

侯陳偉¹, 岩永崇志², 中村拓郎¹, 二羽淳一郎¹ (1.東京工業大学 2.大成建設)

キーワード：critical section, inclination of compressive strut, shear, stirrup ratio, tapered RC beam, せん断, 変断面RCはり, 耐力支配断面, せん断補強鉄筋比, 圧縮ストラット角度

This paper presents the experiment of four tapered RC beams with and without stirrups. By comparing with tapered RC beams without stirrups, the shear resistance mechanism of the beams with stirrups was clarified. The location of the critical section was found to be increased due to the use of stirrups, which was related to the stirrup ratios as well. The evaluation method of shear carried by stirrups was also proposed by using the compression strut inclination and critical section at the occurrence of the main diagonal crack. The calculated value showed good correspondence with the experimental results.