Frontiers of Structural and Civil Engineering
>> 2013,
Volume 7,
Issue 4
doi:
10.1007/s11709-013-0225-7
RESEARCH ARTICLE
Determination of mechanical parameters for elements in meso-mechanical models of concrete
Department of Building Engineering, Tongji University, Shanghai 200092, China
Available online: 2013-12-05
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Abstract
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.
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