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http://dx.doi.org/10.7843/kgs.2011.27.5.045

Bearing Capacity Factor of Shallow Foundation in Undrnined Clay Using the Diagrammatic Upper and Lower Bound Methods  

Lee, Yong-Joo (School of Civil Eng., Seoul National Univ. of Science & Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.5, 2011 , pp. 45-59 More about this Journal
Abstract
This study introduces the diagrammatic Upper and Lower Bound (UB and LB) methods theoretically in order to derive the bearing capacity factor, $N_c$ in undrained clay and to compare with Prandtl's exact solution (1921). As a result of the theoretical study, an exact solution comes out when the UB and LB solutions are the same. In addition, the finite element analyses show that the failure loads approach to the bearing capacity factor of 5.14. Results of the FEA significantly depend on the finite element type, a number of elements, and a number of increments. From this study the exact solution defines that solutions from UB and LB are the same. However, this situation is very difficult to process, so we can confirm the exact solution as a range between UB and LB solutions.
Keywords
Bearing capacity factor; Diagrammatic Upper and Lower Bound (UB and LB) methods; Exact solution; Finite element analysis; Shallow foundation; Undrained clay;
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  • Reference
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