A coupled multi-physics model for creep, shrinkage and fracture of early-age concrete
2016 (English)In: 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures / [ed] John E. Bolander, Eric N. Landis, Victor E. Saouma, 2016Conference paper (Refereed)
The behaviour of concrete at early-age is complex and involves several physical fieldssuch as temperature, moisture and deformations. In this paper a hygro-thermo-chemo-mechanicalmodel for the analysis of early-age concrete based on a combination of models from the literature ispresented. The chemical model is based on the reaction degree concept, also used to define internal actions such as self-desiccation and ageing of mechanical properties. A mechanical model based on the Microprestress-Solidification theory for concrete creep is used, that in a simplified manner alsoconsiders concrete fracture. The model has been implemented in a numerical framework suitable for coupled multi-physics problems. It is here applied to a case study of an un-reinforced concrete tunnel plug made of a low-pH self-compacting concrete. Good agreement is generally obtained with measurements and hypotheses previously made on the behaviour of the plug are verified.
Place, publisher, year, edition, pages
Early-age, Shrinkage, Creep, Fracture, Multi-physics, Case study
Research subject Civil and Architectural Engineering
IdentifiersURN: urn:nbn:se:kth:diva-186147OAI: oai:DiVA.org:kth-186147DiVA: diva2:925718
QC 201605032016-05-032016-05-032016-05-03Bibliographically approved