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Unformatted text preview: f c =4 ksi, f d =0.85 f c , =0.002, u =0.003) for concrete. 3. Problem # 3 The reinforced concrete cross section depicted below is subjected to pure bending (no axial force). By assuming E s =29,000 ksi, E c =3,000 ksi, and f t =400 psi, compute 1. The moment of first cracking by neglecting the reinforcement; 2. The moment of first cracking by taking into account the reinforcement; 3. The maximum steel and concrete stresses for a bending moment M =3 M cr , M cr is the cracking moment computed in item 2. Use constitutive laws for service loading conditions. 3#7 12 in 22 in...
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- Spring '08