Análise de confiabilidade em modelos de bielas e tirantes
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Data
2013-08-27
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Universidade Federal de Goiás
Resumo
This work explores the use of reliability techniques for selecting strut and tie models and
explores the use of topology optimization techniques to generate these models automatically.
A literature review is presented exploring probability concepts useful in reliability analysis,
concepts about classic approaches to generate strut and topology optimization. The
formulation is based on concepts of the limit analysis thus they are the theoretical basis of the
strut and tie model. Formulations used in reliability analysis are presented, such as the Monte
Carlo simulation and the methods FOSM and FORM. These techniques are applied in nine
numerical applications. The first two examples explore alternative techniques on the topology
optimization field so as enable appropriate strut and tie results consistent with the project of
concrete structures. The following examples are used to validate the tools used in the
reliability analysis and in the limit analysis. Finally the four following examples apply
reliability analysis with failure function based on limit analysis to compare classic models
with those obtained by using topology optimization and analyze the security level of the
models with respect to changes in concrete strength, reinforcement provided by the ties and
thickness of the struts.
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Citação
SANTOS, V. M. P. Análise de confiabilidade em modelos de bielas e tirantes. 2013. 133 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014.