An Investigation of Environmental Reduction Factor for GFRP Bar Used as Concrete Reinforcement in China

Abstract:

Currently, an environmental reduction factor (ERF) is incorporated in design codes/guidelines of Fiber Reinforced-Polymer (FRP) in reinforced concrete (RC) structures to account for the FRP long-term durability. Due to the lack of real time durability data, justification of the ERF is still necessitated. This paper presents a calibration of ERF for GFRP bar to be used in China on the basis of the prediction of GFRP long-term performance with monthly average temperature records from 32 major cities. Research results show that the ERF values vary from 0.49 to 0.58 at 100% R.H. exposure, while ERFs are greater than 0.70 for all cases being studied when R.H. is below 90%. On the basis of this study, ERF can be recommended as of 0.70 and 0.50 for application with R.H. <90% and moisture saturated exposures, respectively.

• Periodical: Advanced Materials Research (Volume 413)
• Pages: 399-403
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.413.399
• Online since: December 2011
• Authors: Jian Wei Huang
• Keywords: Concrete, Durability, Glass Fiber, Glass Fiber Reinforced Polymer (GFRP), Polymer, Reinforcement, Temperature

References

[1] ACI 440. 1R-06, Guide for the Design and Construction of Concrete Reinforced with FRP Bars, American Concrete Institute, Committee 440, Farmington Hills, MI, USA (2006).

[2] fib, FRP Reinforcement in RC Structures, Bulletin 40, The International Federation for Structural Concrete (fib), Lausanne, Switzerland (2007).

DOI: 10.35789/fib.bull.0040.ch01

[3] Canadian Standards Association International, Canadian Highway Bridge Design Code (CHBDC), CSA-S806-02, Toronto, Ont. (2006).

[4] CAN/CSA-S6-02, Design and Construction of Building Components with Fibre- Reinforced Polymers, Canadian Standards Association, Rexdale, Ontario, Canada, (2002).

[5] Huang, J., Durability Design of GFRP Bar Reinforced Concrete Members: A New Approach, Ph.D. Dissertation, Syracuse University, Syracuse, NY, USA (2010).

[6] Huang, J. and Aboutaha, R., Environmental Reduction Factors for GFRP Bars Used as Concrete Reinforcement: New Scientific Approach, J. of Composites for Construction, ASCE, Vol. 14, Issue 5 (2010), pp.479-486.

DOI: 10.1061/(asce)cc.1943-5614.0000122

[7] Huang, J., Durability of Glass Fiber Reinforced Polymer (GFRP) Bar Used as Concrete Reinforcement: Temperature Effect, Applied Mechanics and Materials, Vols. 94-96 (2011a), pp.1573-1576.

DOI: 10.4028/www.scientific.net/amm.94-96.1573

[8] Huang, J. Long-Term Performance Prediction of GFRP Bar in Moist Concrete under Sustained Loads, Advanced Materials Research, Vols. 255-260 (2011b), pp.3119-3123.

DOI: 10.4028/www.scientific.net/amr.255-260.3119

[9] Huang, J. , Design of Glass Fiber Reinforced Polymer (GFRP) Bar Reinforced Concrete Deck Slab: Strength and Serviceability, Applied Mechanics and Materials, Vols. 99-100 (2011c), pp.1247-1250.

DOI: 10.4028/www.scientific.net/amm.99-100.1247

[10] Huang,J., Sustained Load Effect on GFRP Bar Reinforced Concrete Deck, Applied Mechanics and Materials, Vols. 99-100 (2011d), pp.1251-1254.

DOI: 10.4028/www.scientific.net/amm.99-100.1251

[11] http: /www. heshuixian. com/dispbbs. asp?boardid=63&Id=2090, Aug. 15, (2011).

[12] Dejke, V., and Tepfers, R. , Durability and Service Life Time Prediction of GFRP for Concrete Reinforcement, , FRPRCS-5: Durability of Fibre Reinforced Plastics, Vol. 2, Thomas Telford, London, (2001), p.505–513.

DOI: 10.1142/9789812704863_0079

[13] Bank, L. C., Gentry, T. R., Thompson, B. P., and Russell, J. S., A model specification for FRP composites for civil engineering structures, Constr. Build. Mater., 17(6–7), (2003), p.405–437.

DOI: 10.1016/s0950-0618(03)00041-2