Modelling creep and shrinkage of concrete by means of effective stresses

D. Gawin, F. Pesavento, B. A. Schrefler

Research output: Contribution to journalArticle

63 Scopus citations

Abstract

A novel model of mechanical performance of concrete at early ages and beyond, and in particular, evolution of its strength properties (aging) and deformations (shrinkage and creep strains), described in terms of effective stress is briefly presented. This model reproduces such phenomena known from experiments like drying creep or some additional strains, as compared to pure shrinkage, which appear during autogenous deformations of a maturing, sealed concrete sample. Creep is described by means of the modified microprestress-solidification theory with some modifications to take into account the effects of temperature and relative humidity on concrete aging. Shrinkage strains are modelled by using effective stresses giving a good agreement with experimental data also for low values of relative humidity. Results of four numerical examples based on the real experimental tests are solved to validate the model. They demonstrate its possibilities to analyze both autogenous deformations in maturing concrete, and creep and shrinkage phenomena, including drying creep, in concrete elements of different age, sealed or drying, exposed to external load or without any load.

Original languageEnglish (US)
Pages (from-to)579-591
Number of pages13
JournalMaterials and Structures/Materiaux et Constructions
Volume40
Issue number6
DOIs
StatePublished - Jul 2007

Keywords

  • Concrete strains
  • Creep
  • Effective stress
  • Numerical model
  • Shrinkage

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Modelling creep and shrinkage of concrete by means of effective stresses'. Together they form a unique fingerprint.

Cite this