New and simple equations for ultimate bearing capacity of strip footings on two-layered clays: Numerical study

Danaei Ahmadi, M. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1061/(ASCE)GM.1943-5622.0000615
  3. Publisher: American Society of Civil Engineers (ASCE)
  4. Abstract:
  5. In this paper, two very simple and accurate equations are introduced that enable geotechnical engineers to determine the undrained ultimate bearing capacity of shallow strip foundations resting on two-layered clays. Results of the analyses show that in the case of weak-overstrong clay, usually general shear failure occurs, and in the case of strong-over-weak clay, the soil will most likely experience punching failure with a large amount of plastic settlement before it reaches its ultimate bearing capacity. This study applied the finite-difference method using a computer program to evaluate the undrained bearing capacity for all cases analyzed. The Mohr-Coulomb failure criterion was used for modeling the plastic behavior of soil. Simple equations are presented for cases of both strong-over-weak clay and weak-over-strong clay representing the bearing capacity of shallowfoundations resting on two-layered clays. Results of this study are verified by acceptable statistical methods, and advantages of the presented equations in this paper are discussed
  6. Keywords:
  7. Bearing capacity ; Design ; Failure mechanism ; Numerical modeling ; Strip footings ; Two-layered clays ; Design ; Failure (mechanical) ; Finite difference method ; Numerical models ; Failure mechanism ; General shear ; Mohr-Coulomb failure criterion ; Plastic behavior ; Plastic settlements ; Strip footing ; Strip foundation ; Ultimate bearing capacity ; Bearing capacity
  8. Source: International Journal of Geomechanics ; Volume 16, Issue 4 , 2016 ; 15323641 (ISSN)
  9. URL: http://ascelibrary.org/doi/10.1061/(ASCE)GM.1943-5622.0000615