To be able to compare the calculated shear reinforcement with the calculation result of RF-CONCRETE Members, ρ w is determined with the required longitudinal reinforcement at the distance d from the support. To apply Equation b), it is necessary to know the longitudinal reinforcement ratio ρ w. The shear resistance V c,a according to Equation a) is calculated as V c,a = 35.0 kips. When considering the minimum shear reinforcement, the concrete shear resistance V c can now be determined with Equations a) or b) of Table 22.5.5.1. Shear Resistance Vc According to ACI 318-19, Table 22.5.5.1, Equation a)Ĭross-sectional area of the shear reinforcement If the minimum shear reinforcement A v,min according to 9.6.3.4 is available or exceeded, the calculation of V c may be performed either according to Equation a) The determination of the shear resistance V c according to Table 22.5.5.1, depends on the inserted shear reinforcement A v. Equation a) was basically taken from ACI 318-14. With the new Equations b) and c), the member height, the longitudinal reinforcement ratio, and the normal stress now influence the shear strength, V c. Shear Resistance V c According to ACI 318-19įor non-prestressed reinforced concrete beams, the shear resistance V c is calculated according to ACI 318-19 with Equations a) to c) from Table 22.5.5.1. Furthermore, the concept should consider the influence of the component height, the longitudinal reinforcement ratio, and the normal stress. One of the objectives of the new concept in ACI 318-19 was to reduce the design equations for V c. The user can choose between a simplified and an exact calculation method. In the previous standard ACI 318-14 , eight equations are specified for the calculation of the shear strength V c - without considering the application limits.
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