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Updating Uncertainties in Friction Angles of Clean Sands

Ching, Jianye / Chen, Jieru / Phoon, Kok-Kwang

It is essential to characterize the uncertainties of soil shear strengths, including friction angles of sands. In particular, it is of practical interest to reduce the uncertainties in friction angles based on all available information by correlation, given the considerable cost of a typical site investigation. This study proposes a systematic way of constructing multivariate correlations on friction angles of clean sands. A set of simplified equations are obtained through Bayesian analysis for the purpose of reducing uncertainties. The inputs to the equations are the results of field and laboratory tests, and the outputs are the updated mean values and standard deviations of the friction angles. Test databases are used to demonstrate the consistency of the proposed simplified equations.

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Updating Uncertainties in Friction Angles of Clean Sands

Ching, Jianye / Chen, Jieru / Phoon, Kok-Kwang

It is essential to characterize the uncertainties of soil shear strengths, including friction angles of sands. In particular, it is of practical interest to reduce the uncertainties in friction angles based on all available information by correlation, given the considerable cost of a typical site investigation. This study proposes a systematic way of constructing multivariate correlations on friction angles of clean sands. A set of simplified equations are obtained through Bayesian analysis for the purpose of reducing uncertainties. The inputs to the equations are the results of field and laboratory tests, and the outputs are the updated mean values and standard deviations of the friction angles. Test databases are used to demonstrate the consistency of the proposed simplified equations.

Updating Uncertainties in Friction Angles of Clean Sands

Ching, Jianye / Chen, Jieru / Phoon, Kok-Kwang

It is essential to characterize the uncertainties of soil shear strengths, including friction angles of sands. In particular, it is of practical interest to reduce the uncertainties in friction angles based on all available information by correlation, given the considerable cost of a typical site investigation. This study proposes a systematic way of constructing multivariate correlations on friction angles of clean sands. A set of simplified equations are obtained through Bayesian analysis for the purpose of reducing uncertainties. The inputs to the equations are the results of field and laboratory tests, and the outputs are the updated mean values and standard deviations of the friction angles. Test databases are used to demonstrate the consistency of the proposed simplified equations.

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Title:

Updating Uncertainties in Friction Angles of Clean Sands

Contributors:

Ching, Jianye (author) / Chen, Jieru (author) / Phoon, Kok-Kwang (author)

Conference:

Georisk 2011 ; 2011 ; Atlanta, Georgia, United States

Published in:

GeoRisk 2011 ; 1133-1140

Publication date:

2011-06-21

ISBN:

DOI:

https://doi.org/10.1061/41183(418)124

Type of media:

Conference paper

Type of material:

Electronic Resource

Language:

English

Keywords:

Retaining structures , Load and resistance factor design , Geotechnical engineering , Seismic effects , Sand (soil type) , Soil dynamics , Shear strength , Earthquake engineering , Friction , Geohazards , Uncertainty principles

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