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http://dx.doi.org/10.9711/KTAJ.2013.15.1.001

Tensile strength evaluation of SFRC subjected to high temperature using double punch test  

Moon, Do-Young (Department of Civil Engineering, Kyungsung Univ.)
Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Lee, Gyu-Pil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Kim, Hee-Sung (Division of Architecture & Civil Engineering, Dongseo Univ.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.15, no.1, 2013 , pp. 1-11 More about this Journal
Abstract
Steel fiber-reinforced concrete (SFRC) is widely used for tunnel lining structure such as shot-crete in NATM tunnel and segment in TBM tunnel. In tunnel fire accidents, structural performance of a lining is very important because the lining is the structure that directly exposed to fire. In this study, the effects of high temperatures, mix ratios and types on failure pattern, DPT tensile strength and coefficient of variation were investigated through Double Punch Tests (DPT) of SFRC subjected to high temperatures. In the results, it is confirmed that the residual DPT tensile strength increases as for SFRC and this is more in SFRC with higher mix ratio. But, the equation for evaluation of DPT tensile strength does not involve the number of failure surfaces SFRC specimens subjected to high temperatures, therefore, it is required to investigate more fracture energy in DPT tests.
Keywords
Double punch test; Tensile strength; SFRC; High temperature;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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