ICF13A

13th International Conference on Fracture June 16–21, 2013, Beijing, China -9- (2) In order to simulate the meso-structure of recycled concrete material, the recycled aggregate concrete is taken as five-phase composites consisting of natural coarse aggregate, new mortar, new interfacial transition zone (ITZ) , old mortar and old ITZ on meso-level in this paper. The random aggregate model is used for the numerical simulation of uniaxial tensile performance of recycled aggregate concrete. The results by the BFEM show that the uniaxial tensile strengths of specimens are approximately coincident with the experiment results, and the size effect of specimens is agree with the common rule. (3) The numerical simulation provides a new way for research on mechanical properties of recycled aggregate concrete. Acknowledgements This work is supported by the National Science Foundation of China, No. 10972015, 11172015. References [1] Du, X. L., Tian, R. J. Peng, Y. J. and Tian, Y. D. (2008). Numerical simulation on the three-graded concrete beam under dynamic loading. World Earthquake Engineering, 24(1), 1-5. [2] Gao, Y. C. (2003). A new description of the stress state at a point with applications. Archive of Applied Mechanics , 73(3-4): 171-183. [3] Liu, G. T. and Wang, Z. M. (1996). Numerical simulation of fracture of concrete materials using random aggregate model. Journal of Tsinghua University (Science and Technology),36(1), 84-89. (in Chinese) [4] Peng, Y. J., LI, B. K. and Liu, B. (2001). Numerical simulation of the mechanics properties of rolled compacted concrete on meso-level. Journal of Hydraulic Engineering, 32(6), 19-22. Peng, Y. J., Dang, N. N. and Cheng, J. (2011). A method on meso-mechanics analysis for recycled aggregate concrete based on random aggregate model. Chinese Congress of Theoretical and Applied Mechanics (CCTAM2011), 1-6. (in Chinese) [5] Peng, Y. J. and Jin, M. (2006). New complementary finite-element method based on base forces. Chinese Journal of Applied Mechanics, 23(4), 649-652. (in Chinese) [6] Peng, Y. J. and Jin, M. (2007a). Application of the Base Forces concept in finite element method on potential energy principle. Journal of Beijing Jiaotong University, 31(4), 1-4. (in Chinese) [7] Peng, Y. J. and Jin, M. (2007b). A New Finite Element Method on Potential Energy Principle by Base Forces. Journal of Beijing University of Technology, 33(7), 687-692. (in Chinese) [8] Peng, Y. J. and Jin, M. (2007c). Finite element method for arbitrary meshes based on complementary energy principle using the base forces. Engineering Mechanics, 24(10), 41-45. (in Chinese) [9] Peng, Y. J. and Liu, Y. H. (2009). Base force element method of complementary energy principle for large rotation problems. Acta Mechanica Sinica, 25(4), 507-515. [10] Peng, Y. J., Dong, Z. L., Peng, B. And Liu, Y. H. (2011). Base force element method (BFEM) on potential energy principle for elasticity problems. International Journal of Mechanics and Materials in Design, 7(3): 245-251. [11] Peng, Y. J., Dong, Z. L., Peng, B., Zong, N. N. (2012). The application of 2D base force element method (BFEM) to geometrically nonlinear analysis. International Journal of Non-Linear Mechanics, 47(3), 153–161. [12] Schlangen, E. and Van Mier, J. G. M. (1992). Simple lattice model for numerical simulation of fracture of concrete materials and structures. Materials and Structures, 25(9), 534-542 [13] Schlangen, E., and Garbocai, E. J. (1997). Fracture simulations of concrete using lattice models: computational aspects. Engineering Fracture Mechanics, 57(2/3), 319-322. [14] Walraven, J. C. and Reinhardt, H. W. (1981). Theory and experiments on the mechanical behavior of cracks in plain and reinforced concrete subjected to shear loading. HERON, 26(1A), 1-68.

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