Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bounding surface plasticity model with reversal surfaces for the monotonic and cyclic shearing of sands
https://orcid.org/http://orcid.org/0000-0002-8289-8170
https://orcid.org/http://orcid.org/0000-0003-2585-2261
The paper describes the formulation and simulative potential of a constitutive model for monotonic and cyclic shearing of sands. It is a SANISAND-type model that does not consider a (small) yield surface and employs the last stress reversal point for defining both the elastic and the plastic strain rates. Emphasis is put on the updating of the stress reversal point to avoid stress-strain overshooting. It incorporates a fabric evolution index that scales the plastic modulus targeting strain accumulation with cycles and a post-liquefaction formulation affecting the dilatancy function. The paper includes the calibration process of the 14 model parameters. Model performance is verified against a large database of monotonic and cyclic shearing tests on Toyoura and Ottawa-F65 sands. To complement sand-specific data, empirical relations are used for validating the shear modulus at small strains, its degradation with cyclic shear strain, the corresponding increase in hysteretic damping, the evolving rates of volumetric and shear strain accumulation with cycles and the effect of relative density and stress level on liquefaction resistance. Model verification shows that a single set of sand-specific parameters may be used for both monotonic and cyclic shearing of any strain level, irrespective of stress level and relative density.
Bounding surface plasticity model with reversal surfaces for the monotonic and cyclic shearing of sands
https://orcid.org/http://orcid.org/0000-0002-8289-8170
https://orcid.org/http://orcid.org/0000-0003-2585-2261
The paper describes the formulation and simulative potential of a constitutive model for monotonic and cyclic shearing of sands. It is a SANISAND-type model that does not consider a (small) yield surface and employs the last stress reversal point for defining both the elastic and the plastic strain rates. Emphasis is put on the updating of the stress reversal point to avoid stress-strain overshooting. It incorporates a fabric evolution index that scales the plastic modulus targeting strain accumulation with cycles and a post-liquefaction formulation affecting the dilatancy function. The paper includes the calibration process of the 14 model parameters. Model performance is verified against a large database of monotonic and cyclic shearing tests on Toyoura and Ottawa-F65 sands. To complement sand-specific data, empirical relations are used for validating the shear modulus at small strains, its degradation with cyclic shear strain, the corresponding increase in hysteretic damping, the evolving rates of volumetric and shear strain accumulation with cycles and the effect of relative density and stress level on liquefaction resistance. Model verification shows that a single set of sand-specific parameters may be used for both monotonic and cyclic shearing of any strain level, irrespective of stress level and relative density.
Bounding surface plasticity model with reversal surfaces for the monotonic and cyclic shearing of sands
https://orcid.org/http://orcid.org/0000-0002-8289-8170
https://orcid.org/http://orcid.org/0000-0003-2585-2261
The paper describes the formulation and simulative potential of a constitutive model for monotonic and cyclic shearing of sands. It is a SANISAND-type model that does not consider a (small) yield surface and employs the last stress reversal point for defining both the elastic and the plastic strain rates. Emphasis is put on the updating of the stress reversal point to avoid stress-strain overshooting. It incorporates a fabric evolution index that scales the plastic modulus targeting strain accumulation with cycles and a post-liquefaction formulation affecting the dilatancy function. The paper includes the calibration process of the 14 model parameters. Model performance is verified against a large database of monotonic and cyclic shearing tests on Toyoura and Ottawa-F65 sands. To complement sand-specific data, empirical relations are used for validating the shear modulus at small strains, its degradation with cyclic shear strain, the corresponding increase in hysteretic damping, the evolving rates of volumetric and shear strain accumulation with cycles and the effect of relative density and stress level on liquefaction resistance. Model verification shows that a single set of sand-specific parameters may be used for both monotonic and cyclic shearing of any strain level, irrespective of stress level and relative density.
Bounding surface plasticity model with reversal surfaces for the monotonic and cyclic shearing of sands
Acta Geotech.
Limnaiou, Taxiarchoula G. (Autor:in) / Papadimitriou, Achilleas G. (Autor:in)
Acta Geotechnica ; 18 ; 235-263
01.01.2023
29 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bounding surface plasticity , Constitutive modeling , Cyclic loading , Liquefaction , Monotonic loading , Sands 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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