with fc1 = vfc and pw is the shear reinforcement ratio according to pw = Asw/bws.
Eq. 6.22 represents a circle in a Vu/fc1 - y coordinate system, Fig. 6.27. It is found that when y runs from 0 to 0.5, 0 runs from 0 to 45°. For y > 0.5, the value of 0 is constant and equal to 45°. However, it was assumed that cot 0 = 2,5 is a limit. In graphical terms this is shown as the linear cut-off in Fig. 6.27.
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