This paper focuses on the computer simulation of elliptic pores in concrete and their effects on the Young's modulus of concrete. Firstly, according to the cumulative distribution function for elliptic pores in terms of the number of the elliptic pores,an algorithm is presented for generating and distributing elliptic pores within a square simulation domain. Secondly, a numerical method is developed to predict the Young's modulus of a unit cell with an elliptic pore. Since the pore area fraction is usually very small,a special mesh generating technique is adopted to divide the unit cell as accurately as possible. The Young's modulus of concrete is then computed by averaging over all possible rotational directions of elliptic pores. Finally, by comparing with the experimental results obtained from the literature,the validity of the numerical method presented in this paper is verified. Based on the numerical results,the effects of the area fraction and the ratio of major axis to minor axis of elliptic pores on the Young's modulus of concrete are assessed in a quantitative manner. It is found that the Young's modulus of concrete decreases with the increase of both the area fraction and the ratio of major axis to minor axis of elliptic pores.
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