Numerical Modeling of the Bahavior of Unsaturated Soils with the BBM in the FLAC Software

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Mohammadi, Hojjat | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46007 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Pak, Ali
Abstract:
Although unsaturated soils exist all around the world, civil engineers are not familiar with unsaturated soil behavior; consequently, the soil structures they design may neither be safe nor economical. Thus, implementing unsaturated soil constitutive models to practical computer softwares can be very beneficial for geotechnical engineers. Geotechnical engineering softwares normally consider soil in saturated or dry conditions. So, their built-in constitutive models do not usually consider unsaturated soils. In this study, Barcelona Basic Model (BBM), which is developed using critical states soils mechanics principles, is implemented to the FLAC2D software. This model can simulate complex behavior of unsaturated soils in different kinds of loading, i.e. stress loading and environmental loading (suction variation in soil). In this thesis, after adding the provided code to the FLAC2D software, the implemented code is verified against the results of some experimental and numerical modelings. One can use this implemented model to analyze and design different kinds of geotechnical structures resting on unsaturated soil
Keywords:
Unsaturated Soil ; FLAC Software ; Barcelona Basic Model (BBM)

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