Proceedings of the
9th International Symposium for Geotechnical Safety and Risk (ISGSR)
25 – 28 August 2025, Oslo, Norway
Editors: Zhongqiang Liu, Jian Dai and Kate Robinson
Towards Bayesian Constitutive Model Parameter Calibration for Strain-Softening Soils
1Department of Engineering, University of Cambridge, UK.
2Centre for Offshore Foundation Systems, University of Western Australia, Australia.
3Department of Engineering, University of Cambridge, UK.
ABSTRACT
Conventional element tests are limited in their ability to observe certain behaviors relevant to offshore engineering (e.g. strain softening). In this paper, an alternative approach to parameter calibration, incorporating full-field measurements, was expanded using Bayesian methods. A constitutive model's strain softening parameters were calibrated using numerical biaxial compression test datasets, altered with noise.Requirements regarding the quality and quantity of data required are recognized with a view to ultimately performing experimental trials of the proposed calibration approach.
Keywords: Constitutive modeling, Parameter calibration, Full-field measurements, Strain-softening, Bayesian inference.
