Damage characterization of beam-column joints reinforced with GFRP under reversed cyclic loading

다국어 초록 (Multilingual Abstract)

The use of fiber reinforced polymer (FRP) reinforcement in concrete structures has been on the rise due to its advantages over conventional steel reinforcement such as corrosion. Reinforcing steel corrosion has been the primary cause of deterioration of reinforced concrete (RC) structures, resulting in tremendous annual repair costs. One application of FRP reinforcement to be further explored is its use in RC frames. Nonetheless, due to FRP's inherently elastic behavior, FRP-reinforced (FRP-RC) members exhibit low ductility and energy dissipation as well as different damage mechanisms. Furthermore, current design standards for FRP-RC structures do not address seismic design in which the beam-column joint is a key issue. During an earthquake, the safety of beam-column joints is essential to the whole structure integrity. Thus, research is needed to gain better understanding of the behavior of FRP-RC structures and their damage mechanisms under seismic loading. In this study, two full-scale beam-column joint specimens reinforced with steel and GFRP configurations were tested under quasi-static loading. The control steel-reinforced specimen was detailed according to current design code provisions. The GFRP-RC specimen was detailed in a similar scheme. The damage in the two specimens is characterized to compare their performance under simulated seismic loading.

참고문헌 (Reference)

1 Fukuyama, H, "Structural performance of concrete frames reinforced with FRP reinforcement" 275-286, 1995

2 Nagasaka, T, "Shear performance of concrete beams reinforced with FRP stirrups" 789-811, 1993

3 Alsayed, S.H, "Shear design of GFRP bars" 285-292, 1997

4 Rahman, A.H, "Service and ultimate load behavior of bridge deck reinforced with carbon FRP grid" 4 (4): 16-23, 2000

5 Priestly, M.J.N, "Seismic Design and Retrofit of Bridges" Wiley Interscience 1996

6 ISIS Canada, "Reinforcing Concrete Structures with Fibre Reinforced Polymers, Manual No"

7 JSCE, "Recommendations for the Design and Construction of Concrete Structures using Continuous Fiber Reinforcing Materials" 23 : 1997

8 "Recommendations for Design of Beam Column Connections in Monolithic Reinforced Concrete Structures" ACI 2002

9 Sugita, M, "NEFMAC grid type reinforcement, Alternative Materials for The Reinforcing and Prestressing of Concrete" Blackie Academic and Professional 55-82, 1993

10 NEFCOM Corporation, "Mechanical Properties of NEFMAC" 1996

11 "Guide for the Design and Construction of Concrete Reinforced with FRP Bars, ACI 440.1R-06" ACI 2006

12 Shehata, E.F.G, "Fibre-Reinforced Polymer (FRP) for Shear Reinforcement in Concrete Structures" University of Manitoba 1999

13 Corley, W.G, "Ductility of columns, walls, and beams-how much is enough?" 331-350, 1995

14 Kobayashi, K, "Design practice of framed building structures based on AIJ design guideline 2002" 1435-1444, 2003

15 Lemaitre, J, "Damage Mechanics: Ductile, Creep, Fatigue and Brittle Failures" Springer 2005

16 Dutta, P.K, "Composite grids for reinforcement of concrete structures" US Army Corps of Engineers, Construction Engineering Research Laboratories 158-, 1998

17 "Canadian Highway Bridge Design Code (CHBDC) (1998), Fibre reinforced structures, Sec. 16, 687-705"

18 "CSA S806-02 (2002), Design and Construction of Building Components using Fibre-Reinforced Polymers"

19 "CSA A23.3-04 (2005), Design of Concrete Structures, Canadian Standards Association"

20 Uzumeri, S.M, "Behaviour of reinforced concrete beam-column joints subjected to slow load reversals" Department of Civil Engineering, University of Toronto 72-, 1974

21 Sharbatdar, M.K, "Behaviour of FRP reinforced concrete under simulated seismic loading" 2004