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Title |
Mechanical Performance Evaluation of RC Beams with FRP Hybrid Bars under Cyclic Loads
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Authors |
황철성(Chul-Sung Hwang) ; 박재성(Jae-Sung Park) ; 박기태(Ki-Tae Park) ; 권성준(Seung-Jun Kwon) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.1.009 |
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Keywords |
FRPH bar ; 정적하중 ; 반복하중 ; 에너지소산비율 ; 항복하중 ; 파괴하중 FRPH (Fiber Reinforced Plastic Hybrid) bar ; Static loading ; Cyclic loading ; Energy dissipation ratio ; Yielding load ; Ultimate load |
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Abstract |
In the present work, a mechanical performances under cyclic loading in RC (Reinforced Concrete) beams with normal steel and FRPH (Fiber Reinforced Plastic Hybrid) bar are investigated. For the work, RC beam members with 200×200×2175 mm of geometry and 24 Mpa of design strength are prepared, and 4-point-bending tests are performed for evaluation of cracking, yielding, and ultimate loads. Through static loading test, 48.9kN and 36.0 kN of yielding loads are measured for normal RC and FRPH beam, respectively. They have almost same ultimate load of 50.0 kN. Typical tension hardening behavior is observed in FRPH beam, which is caused by the behavior of FRPH bar with tension hardening. In cyclic loading conditions, FRPH beam has more smaller crack width and scattered crack pattern, and it shows more elastic recovery than normal RC beam. The energy dissipation ratio in FRPH beam is 0.83, which is greater than 0.62 in normal RC beam and it shows more effective resistance to cyclic loadings.
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