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Concrete creep modelling for structural applications: non-linearity, multi-axiality, hydration, temperature and drying effects.
- Source :
-
Cement & Concrete Research . Jan2016, Vol. 79, p301-315. 15p. - Publication Year :
- 2016
-
Abstract
- Concrete creep models have to consider several important phenomena (non-linearity, multi-axiality, hydration, and thermal and drying effects) to be relevant in structural applications. A selection of experimental results of creep tests found in the scientific literature are used to highlight these phenomena. Firstly, regarding the creep rate in different directions of a specimen under various loads, it is shown that creep rate under moderate loading can derive from elastic strains. Secondly, the reason why a Drucker Prager criterion can be chosen to model non-linear creep is discussed. Thirdly the interest of resorting to a creep theory able to decouple ageing (or hydration) effects and consolidation effects is explained. Moreover, interest using a poro-mechanical formulation, in which Biot coefficient depends on stress state, to model drying creep and shrinkage is discussed in the light of short meso-scopic analysis. The effect of temperature on creep is also addressed. The numerical implementation of the proposed modelling is briefly exposed and the model responses are confronted with experimental results. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00088846
- Volume :
- 79
- Database :
- Academic Search Index
- Journal :
- Cement & Concrete Research
- Publication Type :
- Academic Journal
- Accession number :
- 111295539
- Full Text :
- https://doi.org/10.1016/j.cemconres.2015.10.001