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A semi‐empirical method for the liquefaction analysis of offshore foundations
Author(s) -
Taiebat H. A.,
Carter J. P.
Publication year - 2000
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/1096-9853(200011)24:13<991::aid-nag108>3.0.co;2-5
Subject(s) - liquefaction , geotechnical engineering , foundation (evidence) , submarine pipeline , soil liquefaction , finite element method , monotonic function , engineering , structural engineering , geology , mathematics , mathematical analysis , archaeology , history
Abstract This paper presents a relatively simple method for three‐dimensional liquefaction analysis of granular soil under offshore foundations. In this method, the Mohr–Coulomb model, which defines the elasto–plastic stress–strain relationship under monotonic loading, is modified to accommodate the plastic strains generated by cyclic loading. The effects of cyclic loading, evaluated from the results of laboratory tests on saturated samples of soil, are incorporated into the model. The method is implemented in an efficient finite element program for analyses of three‐dimensional consolidating soil. The practicability of the model is demonstrated by analysis of a typical offshore foundation, and the predictions of the numerical analysis are compared with the observed behaviour of the foundation. Copyright © 2000 John Wiley & Sons, Ltd.