Determine the FRP area and the bending strength corresponding to the balanced strengthening configuration, for the section reported in given Exercise.
Exercise
Determine the factored moment capacity ∅Mn of the rectangular section subjected to interior environmental exposure with an initial deformation in the concrete substrate εbi = 0.0060.
The material and geometric data of the section are: concrete, f'c = 20.68 MP a, width b = 300 mm, height h = 600 mm, reinforcement depth d = 560 mm; steel reinforcement: As = 602 mm2, fy = 413 MP a; FRP, f'fu = 2800 MP a, ε'fu = 0.017, Ef = 164000 MP a,bf = 250 mm, tf = 0.333 mm, n = 1.