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Seismic bearing capacity of foundations on sloping ground using power-type yield criteria
https://orcid.org/http://orcid.org/0000-0002-7808-8984
Experimental studies indicate that the yield parameters for soils remain generally stress dependent, in which case, the internal friction angle reduces continuously with an increase in the normal stress. Such a yield behaviour cannot be modelled correctly by using a linear failure envelope for which case the friction angle does not depend on the stress level such as the Mohr–Coulomb failure criterion. In the current manuscript, a nonlinear yield criterion, considering pure-frictional as well as cohesive-frictional power-type failure envelope, has been employed to compute the bearing capacity of a rough strip footing placed horizontally on sloping ground surface in the presence of pseudo-static seismic inertial forces. The analysis has been performed by using the method of stress characteristics approach. The variation of the seismic bearing capacity factor Nσ, with an increase in horizontal earthquake acceleration coefficient (αh) for various ground inclinations (β), has been provided. The obtained solutions have been compared with different available numerical and experimental results. The factor Nσ reduces continuously with increases in earthquake acceleration as well as slope inclination. It has been clearly noted that the power-type failure criterion provides a much better prediction of the bearing capacity as compared to the conventional Mohr–Coulomb yield criterion.
Seismic bearing capacity of foundations on sloping ground using power-type yield criteria
https://orcid.org/http://orcid.org/0000-0002-7808-8984
Experimental studies indicate that the yield parameters for soils remain generally stress dependent, in which case, the internal friction angle reduces continuously with an increase in the normal stress. Such a yield behaviour cannot be modelled correctly by using a linear failure envelope for which case the friction angle does not depend on the stress level such as the Mohr–Coulomb failure criterion. In the current manuscript, a nonlinear yield criterion, considering pure-frictional as well as cohesive-frictional power-type failure envelope, has been employed to compute the bearing capacity of a rough strip footing placed horizontally on sloping ground surface in the presence of pseudo-static seismic inertial forces. The analysis has been performed by using the method of stress characteristics approach. The variation of the seismic bearing capacity factor Nσ, with an increase in horizontal earthquake acceleration coefficient (αh) for various ground inclinations (β), has been provided. The obtained solutions have been compared with different available numerical and experimental results. The factor Nσ reduces continuously with increases in earthquake acceleration as well as slope inclination. It has been clearly noted that the power-type failure criterion provides a much better prediction of the bearing capacity as compared to the conventional Mohr–Coulomb yield criterion.
Seismic bearing capacity of foundations on sloping ground using power-type yield criteria
https://orcid.org/http://orcid.org/0000-0002-7808-8984
Experimental studies indicate that the yield parameters for soils remain generally stress dependent, in which case, the internal friction angle reduces continuously with an increase in the normal stress. Such a yield behaviour cannot be modelled correctly by using a linear failure envelope for which case the friction angle does not depend on the stress level such as the Mohr–Coulomb failure criterion. In the current manuscript, a nonlinear yield criterion, considering pure-frictional as well as cohesive-frictional power-type failure envelope, has been employed to compute the bearing capacity of a rough strip footing placed horizontally on sloping ground surface in the presence of pseudo-static seismic inertial forces. The analysis has been performed by using the method of stress characteristics approach. The variation of the seismic bearing capacity factor Nσ, with an increase in horizontal earthquake acceleration coefficient (αh) for various ground inclinations (β), has been provided. The obtained solutions have been compared with different available numerical and experimental results. The factor Nσ reduces continuously with increases in earthquake acceleration as well as slope inclination. It has been clearly noted that the power-type failure criterion provides a much better prediction of the bearing capacity as compared to the conventional Mohr–Coulomb yield criterion.
Seismic bearing capacity of foundations on sloping ground using power-type yield criteria
Acta Geotech.
Kumar, Jyant (author) / Korada, Vijaya Sree (author)
Acta Geotechnica ; 18 ; 711-737
2023-02-01
27 pages
Article (Journal)
Electronic Resource
English
Bearing capacity , Earthquakes , Failure , Foundations , Method of characteristics , Power-type failure criterion , Slope Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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