Thermo-hygro-mechanical degradation of concrete: from coupled 3D material modelling to durability-oriented multifield structural analyses

Title: Thermo-hygro-mechanical degradation of concrete: from coupled 3D material modelling to durability-oriented multifield structural analyses
Author(s): S. Grasberger, G. Meschke
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 37
Issue: 268
Issue date: 2004-05-01
Publication year: 2004
Pages: 244 - 256
Total Pages: 13
Nb references: 59
Language: English

Abstract: In addition to loading-induced damage, drying processes and temperature gradients may contribute considerably to the long term degradation of structures made of cementitious materials.
In the paper, a 3D coupled thermo-hygromechanical model for concrete accounting for moistureand heat transport, cracking and irreversible deformations and the various interactions between these processes is developed.
The model is formulated on the basis of thermomechanics of partially saturated porous media in the sense of the BiotCoussy theory.
According to the coupled state equations arising from this theory, moisture and heat transport and the constitutive preand postcracking properties are coupled by means of macroscopic coefficients.
They are determined by relating microscopic and macroscopic quantities and by exploiting symmetry relations associated with the existence of a macroscopic potential.
The resulting model is based on a minimum of material parameters.
As a representative example, a numerical simulation of the long-term degradation of an inner tunnel lining is described in the paper.

Online publication: 2004-03-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/14162