FORMULATING THE BEARING CAPACITY OF STRIP FOOTINGS PLACED OVER TWO-LAYERED CLAYS USING THE FINITE DIFFERENCE METHOD

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AHMADI M.M.; MOFARRAJ KOUCHAKI B.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Sharif Journal of Civil Engineering Year:2015 | Volume:31-2 | Issue:3.1 Page(s): 105-113

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Title

FORMULATING THE BEARING CAPACITY OF STRIP FOOTINGS PLACED OVER TWO-LAYERED CLAYS USING THE FINITE DIFFERENCE METHOD

Author(s)

AHMADI M.M. | MOFARRAJ KOUCHAKI B. | Issue Writer Certificate

Keywords

BEARING CAPACITYQ2

STRIP FOOTINGSQ2

NUMERICAL MODELLINGQ2

CLAYSQ2

TWO-LAYERQ1

Abstract

This paper applies the finite difference method using FLAC to evaluate the undrained BEARING CAPACITY of rigid STRIP FOOTINGS resting on TWO-LAYERed clay deposits For modeling the soil elastic-perfect plastic constitutive some numerical analyses are carried out and the results are compared with theoretical solutions in order to de- termine the accuracy of the model In these analyses values for elastic modulus Poisson ratio undrained soil shear strength foundation width element dimensions in order to identify the effect of each parameter on the final result and to free the modeling from numerical in- accuracies Next the ratio of depth of the upper layer to the width of the foundation (H/B) are varied from 0 15 to 3 while the ratio of undrained soil shear strength of the upper to the lower layer (cUt /cUb) is varied from 0 2 to 5 in order to model and analyze the most probable cases that could be encountered in practice Results of analyses show that whilst in the case of soft over strong clay general failure usually occurs in the case of strong over soft clay as the top soil gets stronger the soil will most likely experience punching failure which is asso- ciated with a high amount of plastic settlement before reaching its ultimate BEARING CAPACITY.Afterwards the results of analyses are compared with the results obtained by other researchers using limit anal- ysis FEM empirical and semi-empirical solutions In the end an equation is presented for each case (strong over soft clay and soft over strong clay) which repre- sents the BEARING CAPACITY of TWO-LAYERed CLAYS and their precision when describing the numerical results is ex- amined A comparison between the results of analyses and those given by the presented formula in this paper shows strong agreement between numerical results and the formula provided for each case (R2 > 0.99) This proves how reliable these equations are in determining the undrained BEARING CAPACITY of STRIP FOOTINGS placed over TWO-LAYERed CLAYS without needing to consult charts and figures

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APA: Copy

AHMADI, M.M., & MOFARRAJ KOUCHAKI, B.. (2015). FORMULATING THE BEARING CAPACITY OF STRIP FOOTINGS PLACED OVER TWO-LAYERED CLAYS USING THE FINITE DIFFERENCE METHOD. SHARIF: CIVIL ENINEERING, 31-2(3.1), 105-113. SID. https://sid.ir/paper/128123/en

Vancouver: Copy

AHMADI M.M., MOFARRAJ KOUCHAKI B.. FORMULATING THE BEARING CAPACITY OF STRIP FOOTINGS PLACED OVER TWO-LAYERED CLAYS USING THE FINITE DIFFERENCE METHOD. SHARIF: CIVIL ENINEERING[Internet]. 2015;31-2(3.1):105-113. Available from: https://sid.ir/paper/128123/en

IEEE: Copy

M.M. AHMADI, and B. MOFARRAJ KOUCHAKI, “FORMULATING THE BEARING CAPACITY OF STRIP FOOTINGS PLACED OVER TWO-LAYERED CLAYS USING THE FINITE DIFFERENCE METHOD,” SHARIF: CIVIL ENINEERING, vol. 31-2, no. 3.1, pp. 105–113, 2015, [Online]. Available: https://sid.ir/paper/128123/en

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