Failure Mechanism and Bearing Capacity of Rigid Footings Placed on Top of Cohesive Soil Slopes in Spatially Random Soil
Publication: International Journal of Geomechanics
Volume 23, Issue 8
Abstract
This paper focuses on the bearing capacity of vertically loaded rigid footings adjacent to slopes with spatially random soil by performing random adaptive finite-element limit analysis. The solution is illustrated by quantitatively assessing the effect of influential factors, taking into account the spatial variability, soil properties, and geometric parameters on the ultimate bearing capacity and failure mechanism. The variability of the slip surface, which has several failure mechanisms, is investigated for various normalized slope heights, footing distances, slope angles, and spatially variable soil cohesions. Different possibilities of failure mechanisms and sliding surface size resulting from these soil patterns are demonstrated with changes in slope geometry and soil spatial variability. The results quantitatively reveal that a high failure probability with a large variation in bearing capacity is induced by the changes in the failure mechanism and slip surface size.
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Acknowledgments
This research was funded by the Natural Science Foundation of Tianjin, China (No. 20JCQNJC01080), the China National Postdoctoral Program for Innovative Talents (Grant No. BX20220225), and the National Natural Science Foundation of China (Nos. 52078337, 52078335, and 52208363). The Natural Science Foundation of Tianjin, China (No. 22JCQNJC01140); the China Postdoctoral Science Foundation (No. 2022M722371).
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International Journal of Geomechanics
Volume 23 • Issue 8 • August 2023
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© 2023 American Society of Civil Engineers.
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Received: Aug 13, 2022
Accepted: Feb 20, 2023
Published online: May 16, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 16, 2023
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