Material model for non-linear finite element analyses of large concrete structures
Morten Engen (Multiconsult AS, Norwegian University of Science and Technology (NTNU))
M.A.N. Hendriks (TU Delft - Applied Mechanics, Norwegian University of Science and Technology (NTNU))
Jan Arve Øverli (Norwegian University of Science and Technology (NTNU))
Erik Åldstedt (Multiconsult AS)
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Abstract
A fully triaxial material model for concrete was implemented in a commercial finite element code. The only required input parameter was the cylinder compressive strength. The material model was suitable for non-linear finite element analyses of large concrete structures. The importance of including a crack closure algorithm was demonstrated on a case involving sequential loading. Bayesian inference was applied to results from a series of benchmark analyses, and the results indicate that the modelling uncertainty can be represented by a log-normal variable with a mean 1.10 and a coefficient of variation of 10.9%.