Abstract
The Barcelona Basic Model and Oxford Model are the two most popular constitutive frameworks postulated to date for unsaturated soils. Additional experimental evidence and calibration data, however, for a wider variety of soils, are still needed to conclusively substantiate their validation. In this work, a slightly refined approach to the original BBM, in light of significant experimental evidence of a non-linear Apparent Tensile Strength locus in the p:s plane, is introduced, and thereby referred to as the Refined Barcelona Basic Model. Results from a series of suction-controlled tests, conducted in a newly developed true triaxial apparatus on compacted clayey sand specimens, are used for calibration of the RBBM. Parameters are finally used to carry out a comparative validation of the BBM, RBBM and OM formulations for a soil subjected to constant-suction axisymmetric shearing.
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© 2012 Springer-Verlag Berlin Heidelberg
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Hoyos, L.R., Pérez-Ruiz, D.D. (2012). A Refined Approach to Barcelona Basic Model Using the Apparent Tensile Strength Concept. In: Mancuso, C., Jommi, C., D’Onza, F. (eds) Unsaturated Soils: Research and Applications. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31343-1_13
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DOI: https://doi.org/10.1007/978-3-642-31343-1_13
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-31342-4
Online ISBN: 978-3-642-31343-1
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