THE INFLUENCE OF TENSILE STRENGTH OF SOILS ON THE BEARING CAPACITY ANALYSIS BY RIGID PLASTIC FINITE ELEMENT METHOD

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  • 剛塑性有限要素法による支持力解析に対する土の引張り領域の強度特性の影響

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<p>Classical solutions of bearing capacity are mainly based on the analytical solutions of metals. However,the tensile strength characteristics of soils are totally different from those of metals. In this article, no tensile stress condition for a first invariant of a stress tensor I1 ≤0 is introduced and implemented into a rigidplastic finite element method. The influence of I1 condition on the bearing capacity of shallow foundations are investigated by rigid plastic finite element analysis. The condition of I1 ≤0 has a limited influence,except for the case of c(> 0), ϕ= 0. However, this condition contributes to the improvement of numerical accuracy and calculation stability of a rigid plastic finite element method.</p>

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