DFI Journal - The Journal of the Deep Foundations Institute
Volume 7, Issue 1, April 2013
DOI: 10.1179/dfi.2013.006
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Direct Solution of the Brinch-Hansen 90% Pile Ultimate Failure Load
Article Type: Technical Note
Dotson, D. W.
Abstract
In 1962, Kondner prepared several papers dealing with hyperbolic stress-strain response of cohesive soils. The following year, Brinch Hansen proposed 80% and 90% failure criteria for stress-strain behavior of cohesive soils. Fellenius was instrumental in popularizing these failure criteria for pile load tests and offered a direct solution equation for the failure load according to the 80% failure criterion. Since the 90% Criterion has been incorporated into the International Building Code, equations for the direct solution of the failure load at the 90% Criterion would be useful to practicing engineers. This Technical Note supplies the derivation methodology for the 80% Criterion and provides expressions to determine the load and deflection at failure for the 90% Criterion.
Keywords:
hyperbolic stress-strain, pile load tests, Brinch Hansen 80% failure criterion