Análise numérica via MEF e dimensionamento pelo método da resistência direta de estacas-prancha metálicas de parede fina sob colapso local

Abstract

This work presents a numerical computational study using FEM for stability analysis and ultimate strength of cold formed steel sheet piles under local collapse, considering typical loads acting on structural elements of foundations, besides evaluating the performance of the current Design Strength Method (DSM) provisions to estimate the ultimate strength. Initially, a linear stability analysis was performed via GBT (Generalized Beam Theory), followed by the mechanical characterization of the buckling modes mentioned above. Next, an ANSYS shell finite element model is employed to perform geometrical and material non-linear analysis of the piles affected by the local buckling mode, aiming to evaluate the structural behavior in elastic-elastic and elastic-plastic post-buckling. Finally, the numerical results obtained in this dissertation are compared with the predictions obtained through the Direct Strength Method (DSM), which is included in ABNT NBR 14762: 2010 (Annex C).