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Title |
An Experimental Study on the Performance of RC Beam according to the Rapid Freezing and Thawing Test Method in the Air
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Authors |
김상우(Sang-Woo Kim) ; 이동주(Dong-Ju Lee) ; 김경민(Kyeong-Min Kim) ; 김진섭(Jin-Sup Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.4.46 |
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Keywords |
동결 융해; 철근 콘크리트 보; 휨 거동; 반복하중; 에너지 소산 능력 Freezing and thawing; RC Beams; Flexural behavior; Cyclic loading; Energy dissipation capacity |
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Abstract |
Concrete structures can cause various problems as the number of common years increases when exposed to external extreme climate conditions. Among these problems, freezing and thawing occur due to the action of extreme climate factors such as heavy rain and heavy snow, which have becomethe most problematic in recent years. In this study, we present a rapid freezing and thawing test method of concrete in the air, referring to KS F 2456,as Seoul exhibits very dry weather during the period of freezing and thawing. Concrete test specimens and RC beams were fabricated to perform rapidfreezing and thawing of 0, 100, 200, and 300 cycles, and the performance evaluation confirmed the degradation of each subject in material and memberunits. The design strength of 24 MPa, which performs rapid freezing and thawing in the air up to 300 cycles, decreases by 5.24 MPa (21%), and asrapid freezing and thawing in the air increases the stress burden on reinforced concrete bending members, reducing the energy absorption (dissipation)ability of structures due to earthquakes.
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