Finite element analysis of cracking due to shrinkage
conference paper
In this paper a finite element formulation for the analysis of mois-ture migration, creep, shrinkage and cracking in cementitious materi-als, such as masonry, is presented. A decoupled approach is followed, where the pore humidity, the driving force for shrinkage, is solved for from a diffusion equation. The evolution of the shrinkage strain field is then computed and employed in a subsequent mechanical analy-sis neglecting stress or cracking influence on the pore humidity. The initiation and growth of cracks are simulated in a smeared way by softening, anisotropic Rankine plasticity. Bulk creep is modelled with visco-elasticity, while the other important cause of time-dependence in quasi-static processes, namely the rate-dependence of the bond ruptures leading to fracture, is accounted for by considering the vis-cosity of the cracking process. The latter contribution is shown to have a regularising effect on the localisation process which accompa-nies smeared cracking models
TNO Identifier
329301
Publisher
AEDIFICATIO Publishers
Source title
Fracture Mechanics of concrete Structures. Volume 2: Numerical models and analysis (
Editor(s)
Mihashi, H.
K. Rokugo, K.
K. Rokugo, K.
Place of publication
Freiburg
Pages
1363-1376
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