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Benchmarking selection of parameter values for the Barcelona basic model

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Sep 2015 Australia, Spain, Spain, France, France, Italy, Italy, United Kingdom, France, United Kingdom, Italy, France, Spain, Spain, France Publisher:Elsevier BVJournal:Engineering Geology, volume 196, pages 99-118 (issn: 0013-7952,

Authors: E. Romero Morales; Alessandro Tarantino; A. Lloret Morancho; Matthias Hofmann; Wojciech Tomasz Sołowski; Jean-Michel Pereira; Roberto Vassallo; +10 Authors

doi: 10.1016/j.enggeo.2015.06.022

handle: 11588/382129 , 11567/997856 , 2117/86568 , 11563/114493 , 1959.13/1331145

Benchmarking selection of parameter values for the Barcelona basic model

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Abstract

Seven teams took part in a benchmarldng exercise on selection of parameter values for the Barcelona Basic Model (BBM) from experimental data on an unsaturated soil. All teams were provided with experimental results from 9 tests performed on a compacted soil in order to determine values for the ten BBM soil constants and an initial value for the hardening parameter. The coordinating team then performed simulations (at stress point level) with the 7 different sets of parameter values, in order to explore the implications of the differences in parameter values and hence to investigate the robustness of existing BBM parameter value selection procedures. The major challenge was found to be selection of values for the constants lambda(0), r, beta, N(0) and p(c) and an initial value for the hardening parameter (p) over bar (0)(0), with the various teams proposing significantly different values for some of these key parameters. A key lesson emerging from the exercise is the importance of choosing a method for selecting values for the parameters beta and p(c) which places the main emphasis on attempting to optimise the match to the experimental spacing of normal compression lines at different values of suction. (C) 2015 Elsevier B.V. All rights reserved. Peer Reviewed

Countries

Australia, Spain, Spain, France, France, Italy, Italy, United Kingdom, France, United Kingdom, Italy, France, Spain, Spain, France

Related Organizations

University of Newcastle Australia
Australia
Université Savoie Mont Blanc
France
University of Basilicata
Italy
Universitat Polite`cnica de Catalunya
Spain
The University of Texas System
United States

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Keywords

Unsaturated soils, ta1172, constitutive modelling, prediction of the stress-strain behaviour of soils, Benchmark, unsaturated soils; barcelona basic model; choice BBM parameters; prediction of the stress-strain behaviour of soils, Renewable energy sources, [PHYS] Physics [physics], 519, Mecànica dels sòls, benchmark, QE, Unsaturated soil, Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels sòls, ta519, ta116, ta512, ta218, [PHYS]Physics [physics], barcelona basic model, ta212, Soil mechanics, Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls, Barcelona basic model, :Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels sòls [Àrees temàtiques de la UPC], unsaturated soils, Geology, Engineering (General). Civil engineering (General), calibration, choice BBM parameters, Constitutive modelling, TA, Barcelona Basic Model; Benchmark; Calibration; Constitutive modelling; Unsaturated soils, Calibration, Barcelona Basic Model, Energies renovables, :Enginyeria civil::Geotècnia::Mecànica de sòls [Àrees temàtiques de la UPC]

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