Análises tensão-deformação de estruturas de solo grampeado. / Stress-Strain analysis of soil nailed structures.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The limit equilibrium methods that are frequently used for design of soi nailing structures do not provide information about the structures stress and strain. However, the techniques success depends on the displacements that mobilize the nails strength. Therefore it is desirable to predict the structures displacement, during and after the excavation; the forces avting on nails; and the stress distribution behind the excavation wall. This study has its importance increased in situations in which the prediction of the behavior is needed to guarantee the safety of adjacent buildings and municipal installations near to the excavation. Three dimensional and two-dimensional fine element stress-strain analyses were carried out for a better understanding of the behavior of the structure. Comparisons of the results of different numerical models led to a clear picture of advantages and disadvantages of different approaches. Numerical comparisons were also carried out between analyses with different constitutive models: elasto-plastic (Mohr-Coulomb), hyperbolic and incremental linear elastic. Application of the linear elastic model required the division of the soil mass in regions, according to stress path. Those comparisons led to the conclusion that, given correctly specified elastic parameters, Theory of Elasticity is able to correctly model the behavior of nailed excavations.

ASSUNTO(S)

estruturas de suporte finite elements three-dimensional numerical analysis excavations theory of the elasticity solos análise numérica soil nailing

ACESSO AO ARTIGO

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