A rectangular footing supports a square column concentrically.
Given: Footing Dimensions: 2.5 m wide x 3 m long and 0.6 m depth
Column Dimensions: 0.55 m x 0.55 m
Concrete, f'c=28 MPa
Steel, f'y=415 MPa
Concrete cover to the centroid of steel reinforcements = 100 mm
Unit weight of concrete = 24 kN/m³
Unit weight of soil = 16 kN/m³
Questions:
a. Determine the concentrated load that the footing can carry based on beam action. Apply effective soil pressure.
b. Calculate the concentrated load that the footing can carry based on two-way action. Apply effective soil pressure.
c. If the allowable soil pressure at service loads is 225 kPa, what column axial load (unfactored) in kN can the footing carry if the depth of earth fill is 2 m above the footing?