Micromechanical modeling and numerical simulation of creep in concrete taking into account the effects of micro-cracking and hygro-thermal
type: Distribution
access URL: https://theses.hal.science/tel-00788439
format: HTML
issued: 2026-05-14T11:51:08.489916
modified: 2026-05-14T11:51:08.461600

test_moissonnage_selune
type: Agent

Micromechanical modeling and numerical simulation of creep in concrete taking into account the effects of micro-cracking and hygro-thermal
type: Dataset
contact point: Organization
  fn: CCSD
keyword: temperator
keyword: beton
keyword: temperature
keyword: relative-humidity
keyword: endommagement
keyword: creep
keyword: damage
keyword: theses
keyword: spiotherengineering-sciences-physicsother
keyword: infoeu-reposemanticsdoctoralthesis
keyword: humidite-relative
keyword: concrete
keyword: fluage
landing page: https://theses.hal.science/tel-00788439
description: Concrete is a complex heterogeneous material whose deformations include a delayed part that is affected by a number of factors such as temperature, relative humidity and microstructure evolution. Taking into account differed deformations and in particular creep is essential in the computation of concrete structures such as those dedicated to radioactive waste storage. The present work aims: (1) at elaborating a simple and robust model of creep for concrete by using micromechanics and accounting for the effects of damage, temperature and relative humidity; (2) at numerically implementing the creep model developed in a finite element code so as to simulate the behavior of simple structural elements in concrete. To achieve this twofold objective, the present work is partitioned into three parts. In the first part the cement-based material at the microscopic scale is taken to consist of a linear viscoelastic matrix characterized by a generalized Maxwell model and of particulate phases representing elastic aggregates and pores. The Mori-Tanaka micromechanical scheme, the Laplace-Carson transform and its inversion are then used to obtain analytical or numerical estimates for the mechanical and hydromechanical parameters of the material. Next, the original micromechanical model of creep is coupled to the damage model of Mazars through the concept of pseudo-deformations introduced by Schapery. The parameters involved in the creep-damage model thus established are systematically identified using available experimental data. Finally, the effects of temperature and relative humidity are accounted for in the creep-damage model by using the equivalent time method; the efficiency of this approach is demonstrated and discussed in the case of simple creep tests
identifier: NNT: 2012PEST1162
issued: 2026-05-14T11:51:08.486058
language: fr
modified: 2026-05-14T11:51:08.486062