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Title |
Numerical Investigation of the Density and Inlet Velocity Effects on Fiber Orientation Inside Fresh SFRSCC
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Authors |
Ali Azad(Ali Azad) ; 이종재(Jong-Jae Lee) ; 이종한(Jong-Han Lee) ; 이건준(Gun-Jun Lee) ; 안윤규(Yun-Kyu An) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.3.016 |
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Keywords |
영향 인자 ; 섬유 정렬 ; 유한 요소법 ; 강섬유 보강 콘크리트 Fiber alignment ; Finite element method ; Steel fiber reinforced self-compacting concrete ; Density ; Inlet velocity |
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Abstract |
Steel Fiber reinforced self-compacting concrete (SFRSCC) has been widely used in a number of structures, such as ordinary civil infrastructures, sky scrapers, nuclear power plants, hospitals, dams, channels and etc. Thanks to its short and discrete reinforcing fibers, its performance, including tensile strength, ductility, toughness and flexural strength gets much better in comparison with ordinary self-compacting concrete (SCC) without any reinforcing fibers. Despite all these aforementioned advantages of SFRSCC, its performance highly depends on fiber's orientation. In case of short discrete fibers, the orientation of fibers is completely random and cannot be controlled during pumping process. If fibers distribution inside hardened state concrete are randomly distributed, it leads to less resistance potential of concrete element, especially in terms of flexural and tensile strength. The maximum expected strength may not be achieved. Therefore, fiber alignment has been considered as one of the important factors in SFRSCC. To address this issue, this study investigates the effects of concrete matrix's density and inlet velocity on fiber alignment during the pumping process using a finite element method.
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