Bearing Capacity of Strip Footings on Slopes Under Eccentric and Inclined Loads
摘要
The present numerical study examines the bearing capacity of eccentric and inclined loaded strip footing on horizontal and sloping grounds. Two-dimensional Finite Element Limit Analysis (2D-FELA) is used to estimate the bearing capacity of a strip footing. The soil is assumed to be perfectly plastic following the Mohr–Coulomb failure criterion. The strip footing of elastic material located on a slope is considered rigid with a rough base. The effects of eccentricity and angle of load inclination of a strip footing on slopes for different embedment depths are examined. The 2D-FELA results are presented in terms of bearing capacity factors Ncq and Nγq. These results are compared with findings from the past studies, demonstrating good agreement between the present results and previous results. In the horizontal ground surface, the bearing capacity factors significantly reduced for the eccentricity ratio (e/B ≥ 0.1) under the vertical load. Further reduction is observed with the increase in the angle of load inclination. While for sloping ground, the bearing capacity of strip footing decreases as the slope angle increases. The location of the eccentric load application also influences the bearing capacity factor Nγqe for footing on slopes. Nγqe increases when a vertical eccentric load is applied towards the crest side, whereas a lower bearing capacity factor is observed when the load acts toward the toe side. Due to the increase in the angle of load inclination, the bearing capacity factors were significantly reduced because of the reduction in the support provided by the soil mass beneath the footing. The percentage of soil mass participation beneath the footing under eccentric and inclined loads is also presented in the study.