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Statistical Model for Mechanical Properties Based on the Microstructure of Concrete

机译:基于混凝土微观结构的力学性能统计模型

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The aim of the present study was to develop a statistical model for the static strength of concrete, which would be based on the optical microstructural analysis of concrete. The composition of concrete was analyzed optically and modeled as a composite material using the statistical theory of combined parallel and serial systems of basic element, concrete is modeled as a composite material consisting of aggregate particles, cement paste and voids. The voids include pores larger than 15 micrometers in diameter and microcracks over 15 micrometers in length. The length of microcracks in modeled as a fictive cracks corresponding to the modified Griffith's theory. The pores are also modeled as fictive cracks in accordance with the method of Bache. The location of the cracks is modeled statistically against the Poisson's distribution. The random distribution of the crack direction has been taken into account in the model. (Copyright (c) Valtion teknillinen tutkimuskeskus (VTT) 1987.)

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