CUED Publications database

Cyclic Response of Clay Deposits: Developing a Constitutive Model

Nouri, H and Biscontin, G (2017) Cyclic Response of Clay Deposits: Developing a Constitutive Model. In: 3rd International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-III), 2017-7-16 to 2017-7-19, Vancouver.

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This study aims at developing a generalized elasto-plastic constitutive model for clays able to describe stress-strain response, accumulation of permanent deformations, and excess pore pressure in monotonic and cyclic loading. This constitutive model takes advantage of the nonlinear elasticity and bounding surface plasticity concepts to mimic generation of excess pore pressure and plastic deformation within the yield surface upon cycles of unloading and reloading during cyclic excitation. The generalized formulation of the model also facilitates the prediction of multi-directional cyclic response of the fine-grained material. Capabilities of the model are evaluated using the available experimental database on Boston Blue Clay (BBC). The model is successful to mimic a wide range of monotonic drained and undrained stress paths as well as the complicated cyclic response of clays. Implementation of the model in numerical packages will facilitate the simulation of different boundary value problems under various loading conditions.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 15 Aug 2017 01:23
Last Modified: 18 Feb 2021 17:48