TY - EJOU
AU - Liang, Shixue
AU - Xie, Zhongshu
AU - Huang, Tiancan
TI - Comparative Investigation of Two Random Medium Models for Concrete Mesostructure
T2 - Computer Modeling in Engineering \& Sciences
PY - 2020
VL - 123
IS - 3
SN - 1526-1506
AB - Concrete is intrinsically endowed with randomness on meso-scale due to the
random distribution of aggregates, mortar, etc. In this paper, two random medium models
of concrete mesostructure are developed and comparative studies are provided based on
random field representation approach. In the first place, concrete is considered as a kind
of one-phase random field, where stochastic harmonic function is adopted as the approach
to simulate the random field. Secondly, in order to represent the stochastic distribution of
the multi-phase of concrete such as aggregates and mortar, two-phase random field based
on the Nataf transformation and the Hermite polynomials are introduced. Then, the proposed
two random medium models are testified by the multi-scale simulation results, specifically,
the mean value of the homogenized stress-strain relationship and the damage evolution curve.
Meanwhile, the generalized density evolution equation is utilized to measure the consistency
of these two random medium models by the probability distribution of damage.
KW - Concrete
KW - one-phase random field
KW - two-phase random field
KW - multi-scale
DO - 10.32604/cmes.2020.09200