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http://dx.doi.org/10.9711/KTAJ.2014.16.3.287

Performance evaluation of SFRC for tunnel segments based on large beam test  

Moon, Do-Young (Department of Civil Engineering, Kyungsung Univ.)
Roh, Hwasung (Department of Civil Engineering, Chonbuk National Univ.)
Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.16, no.3, 2014 , pp. 287-298 More about this Journal
Abstract
In order to develop SFRC TBM tunnel segment, evaluating the SFRC mixture was conducted through flexural tests of SFRC beams without ordinary steel reinforcement in this study. Considered variables were compressive strengths of SFRC, aspect and mix ratio of steel fibers and total 16 specimens were fabricated and tested until failure. The load-vertical displacement results demonstrates that the effect of aspect ratio is minor when compared to results form small beam test(Moon et al, 2013). A SFRC beam resists the vertical load until the width of crack reaches to 7 mm due to steel fibers across cracked surfaces. Moreover, it is found that flexural moment estimated by equation of TR No. 63(Concrete Society, 2011) is useful for prediction of nominal strength for SFRC structure. From the investigation of fiber distribution in cracked section, it is found that dispersion improved in actual size beam compared to in standard small beam for evaluation of flexural strength.
Keywords
SFRC beam; Steel fibers; Fiber distribution; Flexural test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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