Assessment of volumetric collapse using probabilistic approach

I. Otálvaro Calle*, M. P. Cordão-Neto, G. M. Medero

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In the last years, considerable advances have been done in modelling unsaturated soils. Several different approaches have been proposed which include conventional elastoplastic models (e.g. Barcelona Basic Model-BBM), and more complex ones, (e.g. coupling hydraulic and mechanical behavior). However few improvements were done in relation to the process of parameter calibration in these models. Moreover, there are some imprecision on the process of sampling, which also add an error in the calibration process. The result of this error (or imprecision) introduced during the process of achieving parameters can be evaluated through probabilistic methods which has been developed during the last years. In this work three probabilistic methods are applied to evaluate the importance of each parameter of Barcelona Basic Model on the volumetric collapse. Every probabilistic method has a specific function, where Monte Carlo Method (MCM) was used to define variability of parameters when the probabilistic distributions are not known. Another method that is presented is the First Order Second Moment (FOSM) which was used to calculate the contribution of each BBM parameter on the shape of yield curve. Finally, Point-Estimate Method was used to evaluate the mean and standard deviation of volumetric collapse.

Original languageEnglish
Title of host publicationUnsaturated Soils
Subtitle of host publicationProceedings of the 5th International Conference on Unsaturated Soils
PublisherCRC Press
Number of pages6
ISBN (Print)9780415604307
Publication statusPublished - 2011
Event5th International Conference on Unsaturated Soils 2010 - Barcelona, Spain
Duration: 6 Sept 20108 Sept 2010


Conference5th International Conference on Unsaturated Soils 2010


  • FOSM
  • Monte Carlo method
  • Point-estimate method
  • Unsaturated soils

ASJC Scopus subject areas

  • Soil Science


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