Avaliação estatística do erro de modelos de resistência para elementos lineares de concreto armado da ABNT NBR 6118:2007 / Statistical evaluation of resistance modelling error for linear elements of concrete structures of ABNT NBR 6118:2007

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

03/08/2012

RESUMO

In a design of structures, it should be considered the intrinsic uncertainties to the present variables in the structure and in the structural concept, such as intensity and action distribution, mechanic properties of the material, geometric parameters of the structure and structural analysis and calculus models. Thus, the structural safety can only be measured in probabilistic terms. The present study approaches a statistical analysis of model error random variable for the prediction of resistant capacity of linear elements (columns and beams) according to the ABNT NBR 6118:2003 e ACI 318-2002 concrete structures building code requirements. The model error variable is obtained by the ratio between observation of real values and the values obtained according to the building code requirements. The real values of resistance in the concrete structure columns were obtained from an experimental data base acquired from researches on the same elements. The main objective of this work is to evaluate the influence of each considered parameter, such the concrete average resistance to compression, reinforcement rate, columns slenderness, serviceable height and ruin domains in beams, deformation of concrete and steel elements, about the last resistance of the elements. The obtained results show that Brazilian building code are conservative and tendentious in relation to the studied parameters.

ASSUNTO(S)

beams columns concrete structures erro de modelo estruturas de concreto model error pilares segurança das estruturas structural safety vigas

ACESSO AO ARTIGO

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