Reliability Analysis of Laterally Loaded Piles Involving Nonlinear Soil and Pile Behavior
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 3
Abstract
An alternative approach of analyzing laterally loaded piles in the ubiquitous spreadsheet platform is presented. The numerical procedure couples nonlinear pile flexural rigidity with nonlinear analysis. The deterministic study is then extended to carry out reliability analysis, which reflects the uncertainties and correlation structure of the underlying parameters. The reliability index is evaluated based on the alternative intuitive perspective of an expanding equivalent ellipsoid in the original space of the random variables. This paper investigates two modes of failure: deflection and bending moment, and considers non-normal random variables. Spatial variability of the soil medium is accounted for by incorporating an autocorrelation model. The spreadsheet-based reliability approach can also be coupled with stand-alone programs via the response surface method. The probabilities of failure inferred from reliability indices agree well with Monte Carlo simulations. Simple reliability-based design is demonstrated, in which the appropriate pile section or length that satisfies target reliability in one or more limit states is sought.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 3 • March 2009
Pages: 431 - 443
Copyright
© 2009 ASCE.
History
Received: Sep 18, 2007
Accepted: May 15, 2008
Published online: Mar 1, 2009
Published in print: Mar 2009
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