Question

A 300mm square column is reinforced with 3Φ16 bars at each of the two critical faces. If C25 concrete and steel with fyk=300MPa is used, compute the ultimate axial compressive force the section can safely resist.

Answer 1

CS = F ÷ A, Where;

CS is the compressive strength,

F is the force or load at point of failure and

A is the initial cross-sectional surface area.

CS= $\frac{300MPa}{3Φ16(300mm)}$

CS= $\frac{300}{77.67}$

CS= 3.86 Pa