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Numerical Modeling of Interface Behavior for Drilled Shaft Foundations Under Generalized Loading

by Patrick C. -W. Wong, Cornell Univ, United States,
Fred H. Kulhawy, Cornell Univ, United States,
Anthony R. Ingraffea, Cornell Univ, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

To evaluate soil-foundation interaction numerically, an isoparametric thin layer element is used within a 3-D, material nonlinear, general purpose geotechnical analysis system developed at Cornell University. Two quasi-linear models are proposed to describe the interface normal and shear behavior. Non-dilative behavior is assumed, and the Mohr-Coulomb criterion provides the normal stress-dependent shear behavior. Interface deformation modes simulated include stick, slip, debonding, and rebonding. Illustrative results demonstrate the usefulness of these models.

Subject Headings: Shear strength | Numerical models | Mathematical models | Soil properties | Lateral loads | Deep foundations | Axial loads

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