Journal
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
Volume 140, Issue 1, Pages 91-101Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GT.1943-5606.0000997
Keywords
Stiffness; Degradation; Soil-pile interactions; Load tests; Foundation settlement; Load transfer; Stress strain relations; Soil nonlinearity; Stiffness degradation; Soil-pile interface; Load test; t-z curve; Load-settlement curve
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Soil stress-strain behavior is highly nonlinear and considerably influences the performance of a foundation. The response of single piles under axial load can be predicted from the load-transfer, or t-z, curve. This paper presents a new approach to predict the load-transfer curve and subsequently the load-settlement curve. This new approach incorporates nonlinear soil stress-strain behavior and accommodates differences in soil behavior in laboratory and field conditions. Expressions are given for the load-transfer curve, which capture the hardening and softening behavior of soil-pile interactions. Predictions of load-transfer curves and load-settlement curves from the proposed approach have been compared with the measured values from two case studies. The predictions show good agreement with the measured values.
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