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Orientador(es)
Resumo(s)
An accurate hysteresis model is fundamental to well capture the non-linearity phenomena
occurring in structural and non-structural elements in building structures, that are usually made of
reinforced concrete or steel materials. In this sense, this paper aims to numerically estimate through
simplified non-linear analyses, the cyclic response of a reinforced concrete frame using different
hysteretic models present in the literature. A commercial Finite Element Method package is used to
carry out most of the simulations using polygonal hysteretic models and a fiber model, and
additionally, a MATLAB script is developed to use a smooth hysteresis model. The experimental
data is based on the experiments carried out in the Laboratório Nacional de Engenharia Civil,
Portugal. The numerical outcomes are further compared with the experimental result to evaluate the
accuracy of the simplified analysis based on the lumped plasticity or plastic hinge method for the
reinforced concrete bare frame. Results show that the tetralinear Takeda’s model fits closely the
experimental hysteresis loops. The fiber model can well capture the hysteresis behavior, though it
requires knowledge and expertise on parameter calibration. Sivaselvan and Reinhorn’s smooth
hysteresis model was able to satisfactorily reproduce the actual non-linear cyclic behavior of the RC
frame structure in a global way.
Descrição
Palavras-chave
Cyclic response Reinforced concrete Non-linear analysis Hysteresis models Optimization
Contexto Educativo
Citação
Folhento, Pedro; Braz-César, M.T.; Barros, Rui (2021). Cyclic response of a reinforced concrete frame: Comparison of experimental results with different hysteretic models. AIMS Materials Science. ISSN 2372-0484. 8:6, p. 917-931