Abstract
Ultimate bearing capacity calculation is one of the most important factor to design foundations in geotechnical engineering. In this paper, ultimate bearing capacity values were calculated with finite element and analytical methods and compared. A case study of Bozozuk (1972) article is used for ultimate bearing capacity evaluations. On 30 September 1970, 600-ton weight concrete silo suddenly overturned and failure. After failure, in-situ Vane shear test and laboratory tests carried out to determine soil strength parameters for back analysis. In finite element analysis, Plaxis 2D was use. From analytical method maximum factor of safety FS= 1,09 from Terzaghi (1943) and minimum factor of safety FS= 0,97 from Meyerhof (1963). According to finite element analysis results, factor of safety was calculated as FS=0,64. All these results indicate that especially for complex and sensitive soil profiles, finite element analysis method may be used instead of analytical method.
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