Study of the nonlocal model parameters dependency

Study of the nonlocal model parameters dependency

Paper in proceedings (conference paper)

The contribution presents identification of the parameters of the nonlocal model of concrete fracture. The identification is based on the experimental series of concrete beams loaded in three-point-bending performed by the team of prof. Bažant at the Northwestern University. Three parameters are being identified, namely tensile strength, strain governing the initial slope of the softening curve and the radius defining the internal material length. The study shows that it is possible to get multiple different sets of parameters that provide the same response of the numerical model. Thus, the parameters provided by identification are not necessarily unique.

The contribution presents identification of the parameters of the nonlocal model of concrete fracture. The identification is based on the experimental series of concrete beams loaded in three-point-bending performed by the team of prof. Bažant at the Northwestern University. Three parameters are being identified, namely tensile strength, strain governing the initial slope of the softening curve and the radius defining the internal material length. The study shows that it is possible to get multiple different sets of parameters that provide the same response of the numerical model. Thus, the parameters provided by identification are not necessarily unique.

Nonlocal model, concrete fracture, experimental data, identification, weight function

Nonlocal model, concrete fracture, experimental data, identification, weight function

KVĚTOŇ, J.; ELIÁŠ, J.

2017

28.01.2016

Vysoké Učení Technické v Brně

Brno

978-80-214-5311-1

Juniorstav 2016

1

5

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