Question

Four steel rods each with a cross-sectional area of 1in 2 are embedded in a 5-in diameter light aggregate concrete cylinder. The steel has a yield strength of 36000 psi and a modulus of elasticity of 30x10n6 psi. Assume a very strong interface between the steel and the concrete causes them to experience identical deflections. A rigid plate is placed over both ends of the cylinder and a compressive axial force of 100,000 lb is applied. The stress (psi) induced in the steel rod is: a. 5100 b. 8600 c. 12000 d. 18000

Answer 1