A short reinforced concrete column is subjected to a 1000kn axial compressive load.
The moduli of elasticity of plain concrete and steal are 25 GPa and 207GPa respectively, and the corss-sectionial area of steel is 2% of that of the reinforced concrete.
Considering the column as a structural member made of a composite material and subjected to load parallel to the steel rebars, calculate the following:
c. the minimum required cross-sectional area of the column given that the allowable comopressive stress of the plain concrete is 20MPa and that the allowable compressive stress of the plain concrete will be reached before that of the steel.