Journal
ENGINEERING STRUCTURES
Volume 133, Issue -, Pages 151-171Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2016.12.026
Keywords
UHPFRC; Flow induced fiber orientation; Computation fluid dynamics; Non destructive fiber monitoring; Slabs; Structural design
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Funding
- National Sciences and Engineering Research Council of Canada (NSERC) - Collaborative Research and Development Grants [RDCPJ 445200]
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Structural design with highly flowable Fibre Reinforced Concrete has to duly take into account the preferential alignment of fibers, which can be governed through the rheological properties of the fluid mixture and the casting process and by the geometry of the structure. The possibility of predicting the fiber alignment, by tailoring the casting process, and of non-destructively monitoring it, can foster more efficient structural applications and design approaches. Focusing on UHPFRC slabs with pre-arranged casting defects, the flow-induced alignment of the fibers has been predicted by means of a suitable CFD modelling approach and hence monitored via a non-destructive method based on magnetic inductance properties of the fiber reinforced composite. The comparison between the assessed data on the fiber orientation and the crack patterns as visualized by image analysis supports the effectiveness of casting flow modelling and non-destructive fiber dispersion monitoring in supporting the structural design of elements made with highly flowable fiber reinforced cementitious composites. (C) 2016 Elsevier Ltd. All rights reserved.
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