Evaluation of Compressive Strength of Concrete Members Laterally Confined by Various FRP Composites and exposed to High Temperatures

다국어 초록 (Multilingual Abstract)

In the current study, the compressive strength of concrete members laterally confined by various Fiber-Reinforced Polymer (FRP) composites and exposed to high temperatures was investigated. To this end, FRP-composite test specimens composed of glass or carbon fiber with epoxy or phenolic resin were utilized in order to represent the various FRP functions examined for the binding of compression members. The material effects and the temperature-exposure effects were set as experimental variables and were considered for concrete members laterally confined by various FRP composites. The specimens were mounted in a high-temperature furnace for exposure to the experimental temperatures, and the fiber-reinforcement effects from compressive strength tests, along with the properties of the resin types, were determined. The results revealed that the compressive strength of the FRP-compositeconfined concrete members decreased with high-temperature exposure. A behavior change induced by the failure of the inner concrete members at temperatures above 250 degrees was observed. It was concluded that the carbon fiber/phenolic resin combination was more effective than the glass fiber/epoxy resin one under high-temperature exposure.

참고문헌 (Reference)

1 이정윤, "섬유에 의하여 구속된 원형 콘크리트 기둥의 최대변형률 예측" 한국콘크리트학회 15 (15): 726-738, 2003

2 김동권, "단열재용 페놀폼의 물성과 열적특성" 한국공업화학회 17 (17): 357-360, 2006

3 유영찬, "구조보강용 FRP 복합체의 역학적 특성치 분석을 위한 인장시험방법 평가 연구" 한국구조물진단유지관리공학회 12 (12): 73-80, 2008

4 Hwang, J. S, "Stress-strain characteristics of the concrete cylinders confined by carbon fiber sheets" 17 (17): 57-63, 2001

5 Priestley, M. J. N., "Seismic Design and Retrofit of Bridges" John Wiley & Sons, Inc 1996

6 조순호, "GFRP로 구속된 원형단면 콘크리트 단주의 강도 및 변형 능력" 한국콘크리트학회 19 (19): 121-130, 2007

7 이대형, "FRP로 횡구속된 콘크리트의 응력-변형률 거동특성" 한국콘크리트학회 19 (19): 135-144, 2007

8 최은수, "FRP로 구속된 콘크리트 압축부재의 구속효과 분석" 대한토목학회 31 (31): 19-24, 2011

9 Teng, J. G., "FRP Strengthened RC Structures" John Wiley&Sons Ltd. 2002

10 Ki-Tae Park, "Experimental Study on Durability Comparison of the GFRP Decks by Resin Types" 대한토목학회 11 (11): 261-267, 2007

11 Abdalla, H. A., "Evlautaioin of deflection in concrete members reinforced with Fibre Reinforced Polymer (FRP) Bars" 56 (56): 63-71, 2006

12 Sen, Tara, "Efficacy of thermally conditioned sisal FRP composite on the shear characteristics of reinforced concrete beams" 2013 : 1-15, 2013

13 Hyeong-Yeol Kim, "Durability of GFRP Composite Exposed to Various Environmental Conditions" 대한토목학회 10 (10): 291-295, 2006

14 우상균, "Development of Strength Prediction Method of RC Beams Strengthened with Prestressed CFRP Plates by Cross-Section Analysis" 대한토목학회 16 (16): 1011-1022, 2012

15 Young-Geun Lee, "Compression Strength Test of FRP Reinforced Concrete Composite Pile" Korean Society for Advanced Composite Structures 2 (2): 19-27, 2011

16 Seo, S. Y., "Bond strendth of near surfacemounted FRP plate for retrofite of concrete structures" 95 : 719-727, 2013

17 Yousef, A., "Behavior of FRP-Confined concrete after high temperature exposure" 25 : 838-850, 2011

18 Sai, V. S., "An experimental simulation to vilidate FEM to Predict Transverse Young’s Modulus of FRP Composites" 2013 : 1-6, 2013

19 Hwang, J. S., "A study on the axial behavior of the concrete cylinders confined by carbon fiber sheets" 4 (4): 141-148, 2000

20 Chun, S. C., "A Study on the stress-strain model of concrete confined by carbon fiber sheets" 15 (15): 27-36, 1997