Random Field Modeling of Foundation Failure Modes

Two different models for reliability analyses of foundation failure problems are presented, one where only average soil-strength properties are modeled, and one where the soil strength is represented more accurately as a random field. Two example cases are presented, namely static pull-out of a vert...

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Bibliographic Details
Published in:Journal of geotechnical engineering 1990-04, Vol.116 (4), p.554-570
Main Author: Ronold, Knut O
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Exact sciences and technology
Geotechnics
mechanical strength
soil mechanics
Soil mechanics. Rocks mechanics
supports
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Summary:Two different models for reliability analyses of foundation failure problems are presented, one where only average soil-strength properties are modeled, and one where the soil strength is represented more accurately as a random field. Two example cases are presented, namely static pull-out of a vertical pile and horizontal sliding of a gravity-base structure, both installed in clay. Uncertainties in environmental loading as well as in soil-strength properties are modeled. The spatial fluctuation structure of the soil strength is estimated by means of a kriging technique. Reliability calculations for the two example foundations are performed by first-order reliability methods. For each example foundation the results of the two different types of reliability analyses are compared, and the effect of representing the soil strength as a random field is assessed.
ISSN:0733-9410
1944-8368
DOI:10.1061/(ASCE)0733-9410(1990)116:4(554)