Limit loads on soil media and collapse of soil slopes

Slope failures, landslides and foundation failures frequently result in a significant destruction to properties. This severity raises much interest among researchers to develop methods to achieve satisfactory assessment of the danger of slope failures and foundation collapse.; Collapse mechanisms of strip footings under non-symmetrical loads were introduced and the kinematic approach of limit analysis was used to analyze the bearing capacity on footings. Inclination coefficients for surface strip footings were derived. These coefficients fit the numerical limit analysis results better than coefficients suggested earlier in the literature. The seismic effect on limit loads is also investigated. The influence of interface models between foundation and soil on bearing capacity is studied.; The stability of both uniform and reinforced slopes subject to earthquake loading was studied. The method to calculate permanent displacement of slopes under real earthquakes was developed. Displacement charts for design were developed for different earthquake levels. With these a displacement criterion rather than the factor of safety could be developed for future slope design. A limit analysis approach is applied to determine the amount of reinforcement necessary to prevent collapse of slopes due to reinforcement rupture, pullout, or direct sliding. The length of reinforcement is also calculated and both reinforcement pullout and direct sliding are accounted for. Design charts for both the required reinforcement strength and its length under different earthquakes were also produced.