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Published in:
2019 | OriginalPaper | Chapter
Scaling Factor for Generating P-Y Curves for Liquefied Soil from Its Stress-Strain Behavior
Authors : Suresh R Dash, Subhamoy Bhattacharya, Praveen Huded
Published in: Advances in Numerical Methods in Geotechnical Engineering
Publisher: Springer International Publishing
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Abstract
The technique of constructing a p-y curve relies upon the similarity between load-deformation characteristics of pile with the stress-strain behavior of the interacting soil as observed in many recent experimental studies. From a dimensional analogy of pile-soil interaction with flow type strain field, the strain distribution in soil due to pile deflection (y) can be considered proportional to the y/D ratio, where D is the diameter of the pile. When the depth of the construction is deep, the pile-soil interaction can be considered as a plain strain model. To obtain the p-y curve from stress-strain curve, scaling factors such as Ms and Ns are normally used. Although these scaling factors are well calibrated and are being used in practice since long for standard soil, its applicability and values for liquefied soil is very limited. This paper provides a simplified methodology of developing these scaling factors suitable for liquefiable soils by using a numerical procedure with virtual work principle.