Análise numérica de provas de carga em sapatas utilizando o método dos elementos finitos

• Autor(a) principal: Burnier, Andréia Aparecida Lopes
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3740
• topic: Análise numérica; Modelos constitutivos; Elementos finitos; Prova de carga; Fundações superficiais; Numerical analysis; Constitutive models; Finite element method; Load test; Shallow foundations; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA

This work presents numerical analyses of shallow foundations. Two load tests performed by GOUVÊA (2000) and DUARTE (2006) were analyzed using the finite element method. The stress-strain behavior of the soils was represented by different constitutive models: a non-linear-elastic (hyperbolic), an elastic-perfectly-plastic (Mohr-Coulomb) and an elastoplastic (Lade-Kim). The constitutive model parameters were determined from triaxial and oedometer tests. Results of these analyses were compared to the load-settlement curves obtained from the field tests. The main conclusions are that the numerical solution obtained using the hyperbolic model provided the best comparisons with the test performed by DUARTE (2006) and the solution obtained using the Mohr-Coulomb model supplied the best comparisons with the test accomplished by GOUVÊA (2000). Also, the stress bulbs obtained from numerical analyses were deeper than the ones normally considered in practical situations. Finally, the numerical analyses confirmed the local failure observed on the field tests.