(Answered): Determine (a) the maximum compressive stress in concrete and (b) tensile stress in steel when a mom ...

Determine (a) the maximum compressive stress in concrete and (b) tensile stress in steel when a moment of 35 k-ft. is applied to the cross-section shown below. (c) Determine the cracking moment, Mer, for the beam shown in Fig.1 below. Use the transformed moment of inertia, I, instead of the gross moment of inertia, Ig for your calculation as discussed in the class. It is given that: f 6,000 psi 18" 21" 2#9 3" Figure 1 Notes: The area of one #9 reinforcing bar is: 1.0 in You can assume that Modulus of rupture of concrete:f 7.5V fc both parameters in psi Elastic modulus of concrete: Ec57,000Nf'c both parameters in psi Elastic modulus of steel: E-29 x 10 psi