A micromechanical approach to elastic and viscoelastic properties of fiber reinforced concrete
Some aspects of the constitutive behavior of fiber reinforced concrete (FRC) are investigated within a micromechanical framework. Special emphasis is put on the prediction of creep of such materials. The linear elastic behavior is first examined by implementation of a Mori-Tanaka homogenization scheme. The micromechanical predictions for the overall stiffness prove to be very close to finite element solutions obtained from the numerical analysis of a representative elementary volume of FRC modeled as a randomly heterogeneous medium. The validation of the micromechanical concepts based on comparison with a set of experiments, shows remarkable predictive capabilities of the micromechanical representation. The second part of the paper is devoted to non-ageing viscoelasticity of FRC. Adopting a Zener model for the behavior of the concrete matrix and making use of the correspondence principle, the homogenized relaxation moduli are derived analytically. The validity of the model is established by mean of comparison with available experiment measurements of creep strain of steel fiber reinforced concrete under compressive load. Finally, the model predictions are compared to those derived from analytical models formulated within a one-dimensional setting.
- OSTI ID:
- 21344750
- Journal Information:
- Cement and Concrete Research, Vol. 40, Issue 3; Other Information: DOI: 10.1016/j.cemconres.2009.10.018; PII: S0008-8846(09)00301-9; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CREEP
FIBERS
FINITE ELEMENT METHOD
FLEXIBILITY
FORECASTING
NUMERICAL ANALYSIS
REINFORCED CONCRETE
STEELS
STRAINS
ALLOYS
BUILDING MATERIALS
CALCULATION METHODS
CARBON ADDITIONS
COMPOSITE MATERIALS
CONCRETES
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATHEMATICAL SOLUTIONS
MATHEMATICS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
REINFORCED MATERIALS
TENSILE PROPERTIES
TRANSITION ELEMENT ALLOYS