The properties of the reinforced concrete beam are b = 304 mm, d = 475 mm, Ast = 1035 mm2, and Est / Eco = 9. If the working stresses are 17.7 MPa for concrete and 114.5 MPa for steel, determine the corresponding bending moment (in Nm) for the steel. Round off the final answer to two decimal places. -b- h ΝΑ Ast (total area) d

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The composite bar is subjected to a normal force P = 7500 lb as shown in the figure. The section of the composite bar is composed of two hollow tubes and a solid steel core. Determine the axial stress developed in each bar. Use Ecu = 18 x 106 psi, Est = 30 x 106 psi, and Ebr = 16 x 106 psi.

The solid circular drill rod AB is made of a steel that is assumed to be elastoplastic with τY = 22 ksi and G = 11.2 × 106 psi. Knowing that a torque T = 72 kip·in. is applied to the rod and then removed, determine the maximum residual shearing stress in the rod.       The maximum residual shearing stress in the rod is  ksi.