TWO DIMENSIONAL ANALYSIS OF DRYING SHRINKAGE MICRO-CRACKING IN CONCRETE WITH MODIFIED SMEARED CRACKING MODEL

The traditional fracture energy cracking criterion in a smeared cracking model,with the limitation of poor convergence and misjudgement of micro-cracks,is not applicable in the meso-level simulation of drying shrinkage micro-cracking in concrete.A modified smeared cracking model with an equivalent fracture energy cracking criterion is proposed and employed in the simulation of drying shrinkage micro-cracking in concrete specimens using an explicit method available in the commercial software ABAQUS.The micro-crack patterns from simulations of single-aggregate and random-aggregate-structure specimens agree well with the experimental results,showing the applicability of the modified smeared cracking model in modeling the meso-level drying shrinkage micro-cracking in concrete.