%A Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN %T Determination of mechanical parameters for elements in meso-mechanical models of concrete %0 Journal Article %D 2013 %J Front. Struct. Civ. Eng. %J Frontiers of Structural and Civil Engineering %@ 2095-2430 %R 10.1007/s11709-013-0225-7 %P 391-401 %V 7 %N 4 %U {https://journal.hep.com.cn/fsce/EN/10.1007/s11709-013-0225-7 %8 2013-12-05 %X

The responses of cement mortar specimens of different dimensions under compression and tension were calculated based on the discrete element method with the modified-rigid-body-spring concrete model, in which the mechanical parameters derived from macro-scale material tests were applied directly to the mortar elements. By comparing the calculated results with those predicted by the Carpinteri and Weibull size effects laws, a series of formulas to convert the macro-scale mechanical parameters of mortar and interface to those at the meso-scale were proposed through a fitting analysis. Based on the proposed formulas, numerical simulation of axial compressive and tensile failure processes of concrete and cement mortar materials, respectively were conducted. The calculated results were a good match with the test results.