Abstract
There is a limit in application of the conventional analytical methods by the elastic and plastic theories to complicated soil conditions. The finite element method is capable of considering the nonlinear characteristics of soil and of dealing with a complicated ground. Contrary to such an advantage of the finite element method, problems lie in its analysis techniques and errors related thereto. In this study, analyses of the pullout resistance of a buried anchor were performed by an finite element analysis program based on the Lade’s constitutive equation to clarify ground stresses, maximum pullout resistance, etc. The results were compared with one of the pullout test of an anchor by a centrifugal testing machine and the effects of various factors used in the analyses on their results were investigated. The following items have been clarified: (1) the analysis of a shallow anchor requires finer meshes to be taken diagonally from the anchor edge to the ground surface; (2) the Jáky’s equation for the coefficient of earth pressure at rest to obtain the initial stress gives a greater pullout resistance for ϕ < 35°; and (3) a region extending to the side more than three times the anchor width must be included for analyzing a shallow anchor.
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