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Reformulation of a Bounding Surface Constitutive Model to Incorporate the Effects of Bio-Cementation on Sands
This paper describes how an established sand plasticity model was modified to enable the simulation of experimentally observed behaviors of bio-cemented sands under cyclic loading. The proposed model inherits its formulation from PM4Sand, a stress ratio-controlled, critical state-compatible, bounding surface plasticity model, and extends it to incorporate the effects of bio-cementation on the cyclic response of sands. The presented version is preceded by constitutive modifications to better approximate the shear stiffness and strength of a bio-cemented sand. The constitutive equations with major influence on the response of bio-cemented sands are discussed and examples illustrating the modifications to the model are presented together with an initial validation against available experimental data.
Reformulation of a Bounding Surface Constitutive Model to Incorporate the Effects of Bio-Cementation on Sands
This paper describes how an established sand plasticity model was modified to enable the simulation of experimentally observed behaviors of bio-cemented sands under cyclic loading. The proposed model inherits its formulation from PM4Sand, a stress ratio-controlled, critical state-compatible, bounding surface plasticity model, and extends it to incorporate the effects of bio-cementation on the cyclic response of sands. The presented version is preceded by constitutive modifications to better approximate the shear stiffness and strength of a bio-cemented sand. The constitutive equations with major influence on the response of bio-cemented sands are discussed and examples illustrating the modifications to the model are presented together with an initial validation against available experimental data.
Reformulation of a Bounding Surface Constitutive Model to Incorporate the Effects of Bio-Cementation on Sands
El Kortbawi, Maya (author) / Ziotopoulou, Katerina (author) / Boulanger, Ross W. (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 22-32
2022-03-17
Conference paper
Electronic Resource
English
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