Seismic Stability Analysis of Footing Adjacent to Slopes by Slip Line Method

Abstract eng:
Many structures have to be placed on sloping grounds by shallow footings. Evaluation of seismic stability and bearing capacity of such footings is a prominent matter that rarely is considered by researches. In general there are two slopes next to a footing. Apart from symmetric cases, one of the two sides of footing is more likely to fail (first side) and most researches ignore the effect of the other side of footing (second side) in their analysis. In this paper stress characteristic methods (slip line method) has been employed to show the effect of second side on the bearing capacity of footing under both static and dynamic loads. Both horizontal and vertical earthquake coefficients have been imposed to the system. It is shown that slope of the other side aggravates the stability of footing in comparison with footing placed between two symmetric slopes. Besides the present study has taken in to account the inclination of load on footing. Results show that as the inclination of load on footing increases, the bearing capacity of footing decreases.

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