A long strip footing foundation 1 m wide is to be designed for a region where earthquakes could occur. The soil underlying the area has a unit weight equal to 17 kN/m 3 , an angle of internal friction...

A long strip footing foundation 1 m wide is to be designed for a region where earthquakes could occur. The soil underlying the area has a unit weight equal to 17 kN/m³, an angle of internal friction equal to 20°, and a cohesion value c equal to 25 kPa. Assume that the footing will be installed at a depth of 1 m below the adjacent soil surface, that the soil rigidity index is greater than the critical index, and that the depth factors do not apply. For the condition where k_h
equals 0.20 and k_v
is half of k_h, compare the value for static ultimate bearing capacity (Equation 1a) with the value for seismic bearing capacity (Equation 24 and Figure 20). For this problem, do not use a factor of safety when making the comparison.