Abstract
This work presents a methodology to model the basic creep of concrete, considering aging and damage. Continuum elements with viscoelastic material represent the basic creep with aging using the solidification theory; interface elements with a cohesive zone model describe damage behavior through a linear softening law. Given the challenges of obtaining a unique set of parameters from experimental tests, a calibration process based on decoupling the physical phenomena is adopted. In addition, an inverse analysis is used when characterization tests are not available, allowing an indirect model calibration. Afterward, numerical results are compared with experimental data from bending creep tests. These results show that the proposed methodology can accurately represent concrete creep behavior at different load levels and specimen sizes besides predicting the beams’ residual capacity observed in tests with high load levels.
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