masterThesis
Modelagem numérica de estruturas de contenção atirantadas em areia
Fecha
2012-07-02Registro en:
GURGEL, John Glennedy Bezerra. Numerical modelling of tied-back retaining walls in
sand. 2012. 169 f. Dissertação (Mestrado em MECÂNICA DAS ESTRUTURAS, ESTRUTURAS DE CONCRETO E ALVENARIA E MATERIAIS E PROCESSOS CONSTRUTIVOS) - Universidade Federal do Rio Grande do Norte, Natal, 2012.
Autor
Gurgel, John Glennedy Bezerra
Resumen
A numerical study on the behavior of tied-back retaining walls in sand, using
the finite element method (FEM) is presented. The analyses were performed using
the software Plaxis 2D, and were focused on the development of horizontal
displacements, horizontal stresses, shear forces and bending moments in the
structure during the construction process. Emphasis was placed on the evaluation of
wall embedment, tie-back horizontal spacing, wall thickness, and free anchor length
on wall behavior. A representative soil profile of a specific region at the City of Natal,
Brazil, was used in the numerical analyses. New facilities built on this region often
include retaining structures of the same type studied herein. Soil behavior was
modeled using the Mohr-Coulomb constitutive model, whereas the structural
elements were modeled using the linear elastic model. Shear strength parameters of
the soil layers were obtained from direct shear test results conducted with samples
collected at the studied site. Deformation parameters were obtained from empirical
correlations from SPT test results carried out on the studied site. The results of the
numerical analyses revealed that the effect of wall embedment on the investigated
parameters is virtually negligible. Conversely, the tie-back horizontal spacing plays
an important role on the investigated parameters. The results also demonstrated that
the wall thickness significantly affects the wall horizontal displacements, and the
shear forces and bending moments within the retaining structure. However, wall
thickness was not found to influence horizontal stresses in the structure