Title:
Creep, Shrinkage, and Anisotropic Damage in Alkali-Aggregate Reaction Swelling Mechanism-Part II: Identification of Model Parameters and Application
Author(s):
Etienne Grimal, Alain Sellier, Yann Le Pape, and Eric Bourdarot
Publication:
Materials Journal
Volume:
105
Issue:
3
Appears on pages(s):
236-242
Keywords:
alkali-aggregate reaction; cracking; durability; finite element modeling; moisture; orthotropic
DOI:
10.14359/19819
Date:
5/1/2008
Abstract:
This paper deals with parameter identification and model application of a finite element procedure developed for analysis of concrete structures affected by alkali-aggregate reaction (AAR). Theoretical aspects of the model (constitutive laws and underlying assumptions) have been presented and discussed in Part I of this study. The particularity of the model is the coupling between AAR, creep, shrinkage, and anisotropic damage. The first section of this study provides a calibration procedure for the model parameters. Then, an application of the model is carried out on degraded reinforced concrete beams under changing and inhomogeneous moisture conditions. The main results concern the capability of the model to reproduce simultaneously strong anisotropic swelling, damage observed during experiments, and structural displacements. A final discussion highlights the influence of oriented cracking induced by restrained AAR swelling on stress states.