A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Liquefaction as Microstructural Instability and Validations: The Disturbed State Concept
Instabilities can occur in solids and fluid infiltrated granular systems affected by elastic, plastic and creep strains, friction, adhesion, sliding, rotation of grains/particles and surface forces due to readjustment or reorganization of the microstructure. Instabilities can occur at multiple locations at different states during deformation, e.g. transition from compactive to dilative volume change, peak condition and critical states at which failure or liquefaction initiates leading to final liquefaction. Conventionally, liquefaction is often identified based on the comparison of induced pore water pressure and the initial effective stress, which is considered to be an external method to represent the internal mechanism in the deforming material, which may not be realistic. In contrast, the disturbed state concept (DSC) and energy approaches can provide fundamental procedures and allow for internal mechanisms. The DSC provides a unique and basic model for the initiation and final liquefactions corresponding to the critical (Dc) and final (Df) disturbances, respectively. The issue like shear band formation occurs as a special case and can represent only one state of such distributed mechanisms. The DSC for liquefaction analysis is emphasized in this paper. A number of laboratories simulated and field validations for geomechanical problems are also presented.
Liquefaction as Microstructural Instability and Validations: The Disturbed State Concept
Instabilities can occur in solids and fluid infiltrated granular systems affected by elastic, plastic and creep strains, friction, adhesion, sliding, rotation of grains/particles and surface forces due to readjustment or reorganization of the microstructure. Instabilities can occur at multiple locations at different states during deformation, e.g. transition from compactive to dilative volume change, peak condition and critical states at which failure or liquefaction initiates leading to final liquefaction. Conventionally, liquefaction is often identified based on the comparison of induced pore water pressure and the initial effective stress, which is considered to be an external method to represent the internal mechanism in the deforming material, which may not be realistic. In contrast, the disturbed state concept (DSC) and energy approaches can provide fundamental procedures and allow for internal mechanisms. The DSC provides a unique and basic model for the initiation and final liquefactions corresponding to the critical (Dc) and final (Df) disturbances, respectively. The issue like shear band formation occurs as a special case and can represent only one state of such distributed mechanisms. The DSC for liquefaction analysis is emphasized in this paper. A number of laboratories simulated and field validations for geomechanical problems are also presented.
Liquefaction as Microstructural Instability and Validations: The Disturbed State Concept
Lecture Notes in Civil Engineering
Barla, Marco (editor) / Di Donna, Alice (editor) / Sterpi, Donatella (editor) / Desai, Chandrakant S. (author) / Alyounis, Mohamad Essa (author)
International Conference of the International Association for Computer Methods and Advances in Geomechanics ; 2021 ; Turin, Italy
2021-01-15
27 pages
Article/Chapter (Book)
Electronic Resource
English
Assessment of liquefaction potential based on modified disturbed state concept
| Springer Verlag | 2011
Assessment of liquefaction potential based on modified disturbed state concept
| Online Contents | 2012
Cyclic Behavior and Liquefaction of Sand Using Disturbed State Concept
| British Library Online Contents | 2000
Fundamental procedure for the identification of liquefaction using disturbed state concept
| British Library Conference Proceedings | 1999