Predicting Shear Capacity of FRP-Reinforced Concrete Beams without Stirrups by Artificial Neural Networks, Gene Expression Programming, and Regression Analysis
Table 1
Shear design equations for FRP-RC beams without stirrups.
For sections with an effective depth greater than 300 mm, the concrete shear resistance, , is taken as ; Where λ = modification factor for density of concrete and φc = resistance factor for concrete
Satisfying the limitation: ≤ 1 Where = design shear stress, MPa, defined as 0.25fct; fct = characteristic tensile strength of concrete (5% fractile), MPa, ;γc = is the strength safety factor f concrete, γc = 1.6; k = factor taken equal to in members where more than 50% of the bottom reinforcement is interrupted; if not, it will be ; = depth in meters; ρ1 = (Af/bwd) which cannot be taken less than 0.01 and greater than 0.02
,, Such that , for ≤ 60 MPa In members with effective depth greater than 300 mm and with transverse reinforcement less than the minimum, should be multiplied by