Bearing capacity of eccentrically loaded strip footing on spatially variable cohesive soil

• Autorzy: Dobrzański Jędrzej , Kawa Marek

Identyfikatory

DOI

10.2478/sgem-2021-0035

• Języki publikacji: EN

Abstrakty

EN

The study considers the bearing capacity of eccentrically loaded strip footing on spatially variable, purely cohesive soil. The problem is solved using the random finite element method. The anisotropic random field of cohesion is generated using the Fourier series method, and individual problems within performed Monte Carlo simulations (MCSs) are solved using the Abaqus finite element code. The analysis includes eight different variants of the fluctuation scales and six values of load eccentricity. For each of these 48 cases, 1000 MCSs are performed and the probabilistic characteristics of the obtained values are calculated. The results of the analysis indicate that the mean value of the bearing capacity decreases linearly with eccentricity, which is consistent with Meyerhof's theory. However, the decrease in standard deviation and increase in the coefficient of variation of the bearing capacity observed are non-linear, which is particularly evident for small eccentricities. For one chosen variant of fluctuation scales, a reliability analysis investigating the influence of eccentricity on reliability index is performed. The results of the analysis conducted show that the value of the reliability index can be significantly influenced even by small eccentricities. This indicates the need to consider at least random eccentricities in future studies regarding probabilistic modelling of foundation bearing capacity.

Słowa kluczowe

EN

random field; scale of fluctuation; eccentric load; cohesive soil; probabilistic analysis

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2021
• Tom: Vol. 43, nr 4
• Strony: 425--437
• Opis fizyczny: Bibliogr. 33 poz., rys., tab.

Twórcy

autor

Dobrzański Jędrzej

• Institute of Fundamental Technological Research Polish Academy of Sciences

autor

Kawa Marek

• Wroclaw University of Science and Technology, Faculty of Civil Engineering

Bibliografia

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