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A Coupled Creep-Damage Model for Hardening Concrete
In order to understand the interaction between creep and damage, some experimental methods were developed to follow the microcracking evolution during creep tests as the acoustic emission technique. However, these techniques are unable to analyze the real coupling between creep and damage. In fact, the creep deformations lead to the damage which in turn modifies the creep deformations. Thanks to the modeling, we can take in consideration the microscopic mechanisms to better evaluate the creep deformations of young concrete. For this, a multi-scale creep model was developed to calculate the viscoelastic parameters at the concrete scale from those of hydrates. Then, the creep model was coupled to an isotropic damage model to understand the interaction between creep and damage during creep tests and to evaluate its effect on the mechanical behavior after creep. Finally, the coupled model was used to simulate the interaction creep-damage of pre-damaged materials in order to assess the effect of an initial damage on the creep deformations and on the residual capacity.
A Coupled Creep-Damage Model for Hardening Concrete
In order to understand the interaction between creep and damage, some experimental methods were developed to follow the microcracking evolution during creep tests as the acoustic emission technique. However, these techniques are unable to analyze the real coupling between creep and damage. In fact, the creep deformations lead to the damage which in turn modifies the creep deformations. Thanks to the modeling, we can take in consideration the microscopic mechanisms to better evaluate the creep deformations of young concrete. For this, a multi-scale creep model was developed to calculate the viscoelastic parameters at the concrete scale from those of hydrates. Then, the creep model was coupled to an isotropic damage model to understand the interaction between creep and damage during creep tests and to evaluate its effect on the mechanical behavior after creep. Finally, the coupled model was used to simulate the interaction creep-damage of pre-damaged materials in order to assess the effect of an initial damage on the creep deformations and on the residual capacity.
A Coupled Creep-Damage Model for Hardening Concrete
Farah, M. (author) / Grondin, F. (author) / Loukili, A. (author)
10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures ; 2015 ; Vienna, Austria
CONCREEP 10 ; 1226-1234
2015-09-18
Conference paper
Electronic Resource
English
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Coupled Creep and Damage Model for Concrete at Moderate Temperatures
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