ANÁLISES NUMÉRICAS 2D E 3D DO COMPORTAMENTO DE ESTRUTURAS DE SOLO GRAMPEADO
Autor
Paulo Vitor Cunha da Silva
Resumo
Na pesquisa apresentam-se análises numéricas utilizando o programa PLAXIS, tomando por base resultados de modelagem física, em escala real, de estruturas de solo grampeado. As análises foram efetuadas pelo método dos elementos finitos considerando a situação tridimensional e bidimensional. Os resultados foram comparados com as medições dos esforços nos grampos, das tensões e dos deslocamentos na face, no solo e nas paredes do modelo. Observou-se que, em geral, resultados obtidos nas análises numéricas 3D apresentaram-se similares aos mensurados nos modelos físicos. As análises 2D, também foram representativas, no entanto, os esforços axiais máximos nos grampos mostraram-se próximos à face e os momentos fletores máximos e mínimos apresentaram-se menores comparados às análises 3D.
Abstract
This research presents results of the numerical analysis performed using PLAXIS program. The adopted numerical model was verified based on the results of a physical modeling of the full-scale soil nailed structure. Analyses were carried out by the finite element method considering the three-dimensional (3D) and two-dimensional (2D) conditions. The results were compared with measured values in terms of nail forces, stresses and displacements in the face, on the ground and walls of the model. It was observed that, in general, the results of the 3D numerical analyses were in good agreement with those obtained by physical models. Results of the 2D analysis were also representative. However, in the 2D analysis axial forces were maximum near face and bending moments were lower compared to the 3D analysis.
