Creep, Shrinkage, and Anisotropic Damage in Alkali-Aggregate Reaction Swelling Mechanism-Part I: A Constitutive Model

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Creep, Shrinkage, and Anisotropic Damage in Alkali-Aggregate Reaction Swelling Mechanism-Part I: A Constitutive Model Powered By Docstoc
					 ACI MATERIALS JOURNAL                                                                                        TECHNICAL PAPER
Title no. 105-M26


Creep, Shrinkage, and Anisotropic Damage in Alkali-
Aggregate Reaction Swelling Mechanism—Part I:
A Constitutive Model
by Etienne Grimal, Alain Sellier, Yann Le Pape, and Eric Bourdarot


Modeling the behavior of alkali aggregate reaction (AAR)-                       temperature, the model takes these environmental
damaged concrete is made complex by the large number of                         phenomena into account carefully. This model is in the
elementary physical phenomena to be tak
				
DOCUMENT INFO
Description: Modeling the behavior of alkali aggregate reaction (AAR)-damaged concrete is made complex by the large number of elementary physical phenomena to be taken into account (concrete reactivity, thermal activation, moisture dependence, concrete rheology, and damage interaction). This paper presents the elementary physical principles that lead to the formulation of a visco-elasto-plastic orthotropic damage model including chemical pressure induced by AAR. Particular attention is also paid to the modeling of moisture effects on AAR development and on drying shrinkage. The constitutive modeling proposed is developed into the framework of an anisotropic damage theory to realistically model the strong cracking anisotropy and swelling observed on affected reinforced beams. This paper is followed by a second one in which a calibration procedure is given for the model parameters and experimental results are used to verify the capability of the model to describe the mechanical behavior of degraded structures under various environmental and loading conditions. [PUBLICATION ABSTRACT]
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