Which of the following expressions is required to calculate the strength of shear reinforcement for single bar or single group of parallel bars, all bent-up at the same cross section? The characteristic strength and the cross-sectional area of the bent-up bars are given by fy, and Asv, respectively. The angle between the bent-up bar and the axis of the member is given by α.
1
0.87 fy Asv cos α
2
0.87 fy Asv sin α
3
0.87 fy Asv (sin α + cos α)
4
0.87 fy Asv tan α
5
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