NUMERICAL FINITE ELEMENT METHOD AND EXPERIMENTAL STUDY OF UPLIFT CAPACITY ANCHORS

摘要

A study of the break-out factor (N_c) for plate anchors is presented in this paper. Comparisons among finiternelement method (FEM) analysis and laboratory results were performed. A soil corresponding to a soft normallyrnconsolidated clay was considered. Numerical FEM analyses were performed with the Plaxis? code, usingrnan elasto-plastic model with a Mohr-Coulomb criterion. Undrained soil parameters and an adhesion factorrnα??= 1 were used. Values of Nc factor for axisymmetric and 2D FEM were obtained. Two geometries consideringrna perpendicular load applied in the anchor area and horizontal anchor position to different depths werernstudied. In the same way, anchor plates to a reduced scale were tested in a tank containing a soft soil. It wasrnverified that the factors Nc reach constant values beyond a determined depth of the soil. Finally, the experimentalrnand numerical values were compared with suggested methods reported in the literature.