TY - GEN

T1 - Micromechanical model of concrete creep

AU - Khazanovich, Lev

AU - Tuleubekov, Kairat

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84887331149&partnerID=8YFLogxK

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U2 - 10.1061/9780784413111.026

DO - 10.1061/9780784413111.026

M3 - Conference contribution

AN - SCOPUS:84887331149

SN - 9780784413111

T3 - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013

SP - 227

EP - 234

BT - Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete

PB - American Society of Civil Engineers (ASCE)

T2 - 9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013

Y2 - 22 September 2013 through 25 September 2013

ER -