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A platform for research: civil engineering, architecture and urbanism
Micromechanical Model of Concrete Creep
This paper presents a three-dimensional micromechanical model for concrete creep at early age. In this mode, concrete is treated as a two-phase composite material with an aging matrix (cement paste) and inclusions (aggregates). The uniaxial creep behavior of the aging matrix is described by Bazant's solidification theory, which models aging by volume growth of non-aging viscoelastic products of cement hydration. However, the bulk modulus of the matrix is assumed to be time-independent and the inclusion behavior is assumed to be elastic. The Mori-Tanaka scheme is adapted for determining the effective shear and bulk creep operators of the composite material. To enable numerical determination of concrete creep compliance and relaxation functions, continuous integral operators are approximated by matrix operators acting in finite-dimensional spaces. Effective creep operators (which represent overall properties of the composite) are evaluated as rational functions with matrix arguments.
Micromechanical Model of Concrete Creep
This paper presents a three-dimensional micromechanical model for concrete creep at early age. In this mode, concrete is treated as a two-phase composite material with an aging matrix (cement paste) and inclusions (aggregates). The uniaxial creep behavior of the aging matrix is described by Bazant's solidification theory, which models aging by volume growth of non-aging viscoelastic products of cement hydration. However, the bulk modulus of the matrix is assumed to be time-independent and the inclusion behavior is assumed to be elastic. The Mori-Tanaka scheme is adapted for determining the effective shear and bulk creep operators of the composite material. To enable numerical determination of concrete creep compliance and relaxation functions, continuous integral operators are approximated by matrix operators acting in finite-dimensional spaces. Effective creep operators (which represent overall properties of the composite) are evaluated as rational functions with matrix arguments.
Micromechanical Model of Concrete Creep
Khazanovich, Lev (author) / Tuleubekov, Kairat (author)
Ninth International Conference on Creep, Shrinkage, and Durability Mechanics (CONCREEP-9) ; 2013 ; Cambridge, Massachusetts, United States
2013-09-23
Conference paper
Electronic Resource
English
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