1 Division for Structures, Materials and Geotechnics, The Faculty of Engineering and Science, Aalborg University, VBN2 Esbjerg afdelingen, The Faculty of Engineering and Science, Aalborg University, VBN3 Advanced Structural Engineering, The Faculty of Engineering and Science, Aalborg University, VBN4 Department of Civil Engineering, The Faculty of Engineering and Science, Aalborg University, VBN5 The Faculty of Engineering and Science (ENG), Aalborg University, VBN6 Delft University of Technology (TUD), Faculty of Civil Engineering and Geosciences
We present a two-dimensional mesoscopic finite element model for simulating the rate- and moisture-dependent material behavior of concrete. The idealized mesostructure consists of aggregate grains surrounded by an interfacial transition zone embedded in the bulk material. We examine the influence of the most significant constitutive model parameters on global and local response. Different distributions and shapes of the aggregate grains are tested. Three model parameter sets, corresponding to different moisture conditions, are employed in the analysis of two specimens in which the applied loading rate is significantly different. The results indicate that the loading rate has a stronger influence than the saturation level on fracture processes and global strength.
Cement and Concrete Research, 2013, Vol 50, Issue August 2013, p. 74-87
Microstructure; Dynamics; Concrete; Finite Element Analysis; Degradation