Limit analysis solutions for the bearing capacity of strip foundations under seismic conditions

The limit analysis approach is used in this paper to analyse the problem of a strip foundation on cohesive-frictional soil under seismic conditions, based on the pseudo-static approach, considering different inclination factors. In particular, for a weightless c-φ soil the Upper Bound (UB) and the Lower Bound (LB) solutions are found to be coincident and then the exact solutions for the bearing capacity factors Nqe and Nce under seismic conditions are obtained. The effect of soil weight is considered with the UB method. A discussion is made on seismic reduction factors and on their superposition.