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Title |
Size Effect on Compressive Strength of Concrete Specimens Using SFEM (Meso-Scale Finite Element Method)
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Authors |
이성태(Seong-Tae Yi) ; 임진선(Jin-Sun Lim) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.2.195 |
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Keywords |
중규모크기 유한요소 해석법; 압축강도; 크기효과; 형상효과 meso-scale FEM; compressive strength; size effect; shape effect |
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Abstract |
In this study, the meso-scale finite element method was used to study the size effect of the compressive strength of concrete cylindrical specimens and cubes. Prior to the analysis, a method for defining concrete as a meso-scale multiphase composite was described. In other words, the concrete was assumed to be a composite having three phases: aggregate, cement matrix, and ITZ, and material properties were then assigned to each phase. Analysis of the compression failure behavior of concrete was performed using the constructed analysis model, and through this, the size effect and the initiation and progress of cracks were confirmed. In addition, strength correction factors according to suggested by ASTM C42 were compared for non-standard cylindrical specimens. The previously conducted research results and the results obtained in this study showed sufficiently reliable results. Finally, it was confirmed that the compressive strength and size effects of cylindrical specimens and cubes can be sufficiently predicted by using the meso-scale finite element method.
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