Moment Capacity of FRP Reinforced Concrete Beam Assessment Based on Centerline Geometry

Abstract:

The flexural behavior of FRP (Fiber Reinforced Polymer) reinforced concrete beam has been the topic of intensive previous research, because of the spread of use of modern FRP composite materials in the building industry as concrete reinforcement. The behavior of FRP reinforced member is different from the one reinforced with regular steel reinforcement, mainly because of vast difference between moduli of elasticity of FRP composite reinforcement bars and steel. This difference results in the fact that conventional design methods used for years in the field of reinforced concrete structures using steel reinforcement give poor results if attempted use with FRP reinforced structural members. Results of conventional methods are so poor that use of such methods would be dangerous they tend to overestimate load carrying capacity and underestimate deformations both resulting in unsafe predictions. This paper points to formulating easy to use and comprehensible method of predicting moment capacity of FRP reinforced concrete beams subjected to bending loading and validation of the proposed method via set of experiments.

• Periodical: Applied Mechanics and Materials (Volume 486)
• Pages: 211-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.486.211
• Online since: December 2013
• Authors: Jan Zatloukal*, Petr Konvalinka
• Keywords: Composite Reinforcement, Flexural Behavior, FRP, Moment Capacity Reduction Based on Member Curvature

References

[1] FIB Bulletin 40: FRP Reinforcement in Structures, Federation Internationale du Beton, Lausanne, Switzerland, (2007).

[2] ACI Committee 440: Report on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures, American Concrete Institute, Denver, Colorado, (2006).

[3] J. Zatloukal: Flexural behavior of FRP reinforced concrete beam, Doctoral thesis, CTU Prague, (2013).

[4] R. Sovják, P. Máca, P. Konvalinka: Experimental and numerical analysis of concrete slabs prestressed with composite reinforcement, in: Computational Methods and Experimental Measurements XIV Book Series: WIT Transactions on Modeling and Simulation, Volume 48, 2009, pp.: 83-94.

DOI: 10.2495/cmem090081

[5] F. Vogel: Elasto-plastic analysis of continuous beam with internal fiberglass based reinforcement, Bachelor thesis, CTU Prague, (2011).

[6] R. Sovják, F. Vogel, P. Máca: Redistribution of Bending Moment in Continuous Concrete Beams Reinforced with Glass Fibre Reinforced Polymer, in: Proceedings of the 50th Annual Conference on Experimental Stress Analysis, 2012, pp.: 443-447.