Closed-form solutions for bearing capacity of footing on anisotropic cohesive soils

Authors

  • Arif Ali Baig Moghal King Saud University (Arabia Saudita)
  • Mosleh Ali Al-Shamrani King Saud University (Arabia Saudita)

DOI:

https://doi.org/10.4067/S0718-50732015000200003

Keywords:

shallow footings, soil anisotropy, limit analysis

Abstract

Simple closed-form solutions for the undrained bearing capacity of strip footings on anisotropic cohesive soils are derived employing kinematical approach of limit analysis. Both modified Hill-type and translational failure mechanisms, with variable wedge angles, are attempted and the best upper bound for each mechanism has been analytically determined leading to an analytical expression for the bearing capacity factor. The influence of degree of soil anisotropy on the corresponding value for the bearing capacity factor has also been evaluated. For a wide range of degree of anisotropy, the improvement in the predicted upper bound values does not warrant the use of the modified Hill-type mechanism. Instead, the conventional Hill-type failure mechanism, with a fixed wedge angle of p/4, provides a simple and concise analytical expression for the bearing capacity factor that is analytically equivalent to the conventional Prandtl - Reissner bearing capacity factor for the case of isotropic soil multiplied by the average of the sum of degree of anisotropy plus unity.

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Author Biographies

Arif Ali Baig Moghal, King Saud University (Arabia Saudita)

Arabia Saudí Assistant Professor Department of Civil Engineeing College of Engineering King Saud University

Mosleh Ali Al-Shamrani, King Saud University (Arabia Saudita)

Professor

Published

2015-08-31

How to Cite

Baig Moghal, A. A., & Ali Al-Shamrani, M. (2015). Closed-form solutions for bearing capacity of footing on anisotropic cohesive soils. Revista Ingeniería De Construcción, 30(2), 109–125. https://doi.org/10.4067/S0718-50732015000200003

Issue

Section

Original Research