Benchmarking selection of parameter values for the Barcelona basic model

F. D'Onza; S. J. Wheeler; D. Gallipoli; M. Barrera Bucio; M. Hofmann; M. Lloret-Cabot; A. Lloret Morancho; C. Mancuso; J. M. Pereira; E. Romero Morales; M. Sánchez; W. Sołowski; A. Tarantino; D. G. Toll; R. Vassallo

doi:10.1016/j.enggeo.2015.06.022

Benchmarking selection of parameter values for the Barcelona basic model

F. D'Onza^*, S. J. Wheeler, D. Gallipoli, M. Barrera Bucio, M. Hofmann, M. Lloret-Cabot, A. Lloret Morancho, C. Mancuso, J. M. Pereira, E. Romero Morales, M. Sánchez, W. Sołowski, A. Tarantino, D. G. Toll, R. Vassallo

^*Corresponding author for this work

Department of Civil Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

15 Citations (Scopus)

Abstract

Seven teams took part in a benchmarking 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 λ(0), r, β, N(0) and p^c and an initial value for the hardening parameter p-00, 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 β 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.

Original language	English
Pages (from-to)	99-118
Number of pages	20
Journal	Engineering Geology
Volume	196
DOIs	https://doi.org/10.1016/j.enggeo.2015.06.022
Publication status	Published - 8 Sept 2015
MoE publication type	A1 Journal article-refereed

Keywords

Barcelona Basic Model
Benchmark
Calibration
Constitutive modelling
Unsaturated soils

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10.1016/j.enggeo.2015.06.022

https://dro.dur.ac.uk/17929/Licence: CC BY-NC-ND

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D'Onza, F., Wheeler, S. J., Gallipoli, D., Barrera Bucio, M., Hofmann, M., Lloret-Cabot, M., Lloret Morancho, A., Mancuso, C., Pereira, J. M., Romero Morales, E., Sánchez, M., Sołowski, W., Tarantino, A., Toll, D. G., & Vassallo, R. (2015). Benchmarking selection of parameter values for the Barcelona basic model. Engineering Geology, 196, 99-118. https://doi.org/10.1016/j.enggeo.2015.06.022

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abstract = "Seven teams took part in a benchmarking 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 λ(0), r, β, N(0) and pc and an initial value for the hardening parameter p-00, 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 β and pc which places the main emphasis on attempting to optimise the match to the experimental spacing of normal compression lines at different values of suction.",

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author = "F. D'Onza and Wheeler, {S. J.} and D. Gallipoli and {Barrera Bucio}, M. and M. Hofmann and M. Lloret-Cabot and {Lloret Morancho}, A. and C. Mancuso and Pereira, {J. M.} and {Romero Morales}, E. and M. S{\'a}nchez and W. So{\l}owski and A. Tarantino and Toll, {D. G.} and R. Vassallo",

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D'Onza, F, Wheeler, SJ, Gallipoli, D, Barrera Bucio, M, Hofmann, M, Lloret-Cabot, M, Lloret Morancho, A, Mancuso, C, Pereira, JM, Romero Morales, E, Sánchez, M, Sołowski, W, Tarantino, A, Toll, DG & Vassallo, R 2015, 'Benchmarking selection of parameter values for the Barcelona basic model', Engineering Geology, vol. 196, pp. 99-118. https://doi.org/10.1016/j.enggeo.2015.06.022

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AU - D'Onza, F.

AU - Wheeler, S. J.

AU - Gallipoli, D.

AU - Barrera Bucio, M.

AU - Hofmann, M.

AU - Lloret-Cabot, M.

AU - Lloret Morancho, A.

AU - Mancuso, C.

AU - Pereira, J. M.

AU - Romero Morales, E.

AU - Sánchez, M.

AU - Sołowski, W.

AU - Tarantino, A.

AU - Toll, D. G.

AU - Vassallo, R.

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N2 - Seven teams took part in a benchmarking 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 λ(0), r, β, N(0) and pc and an initial value for the hardening parameter p-00, 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 β and pc which places the main emphasis on attempting to optimise the match to the experimental spacing of normal compression lines at different values of suction.

AB - Seven teams took part in a benchmarking 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 λ(0), r, β, N(0) and pc and an initial value for the hardening parameter p-00, 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 β and pc which places the main emphasis on attempting to optimise the match to the experimental spacing of normal compression lines at different values of suction.

KW - Barcelona Basic Model

KW - Benchmark

KW - Calibration

KW - Constitutive modelling

KW - Unsaturated soils

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EP - 118

JO - Engineering Geology

JF - Engineering Geology

ER -

Benchmarking selection of parameter values for the Barcelona basic model

Abstract

Keywords

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