The column shown is made by filling a steel pipe with concrete. The concrete has an Elastic Modulus of Ec = 3,800 ksi and a cross-sectional area of A, = 80 in2 the steel pipe has an Elastic Modulus of Est = 29,000 ksi and a cross-sectional area of Ast = 13 in?. If the column has a length of L = 10 ft and is subjected to a load of P = 260 kip, what is the stress in the concrete? Express your answer in psi, to the nearest 10 psi.

Maximum strain in concrete taken for design is 0.0040 while strain in deformed bar is calculated with an offset at 0.0015. A beam has an effective depth of 550 mm and is reinforced with Fe415 steel. What would be the value of limiting neutral axis depth (in mm) for this beam?

Required information For the concrete beam shown, the modulus of elasticity is 25 GPa for the concrete and 200 GPa for the steel. Take b=218 mm and d = 450 mm. Use an allowable stress of 12.5 MPa for the concrete and 140 MPa for the steel. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Using the area of steel calculated in part a, determine the largest allowable bending moment. The largest allowable bending moment is 96.06 kN-m.

A concrete test cylinder with a cross-sectional area of 28.3 in squared is to be tested in axial compression. Before loading two marks are scribed on the cylinder precisely 8 in apart (as shown in the figure below) when the load is 40,000 lb the marks are measured and found to be 7.997 in apart determine the E value for this concrete. Assume an approximately linear relationship between stress and strain.