Research Articles | Challenge Journal of Structural Mechanics

FRP-RC/PC members subjected to combined actions

A. Ghani Razaqpur, Francesco Bencardino, Lidia Rizzuti, Giuseppe Spadea


DOI: https://doi.org/10.20528/cjsmec.2015.02.001

Abstract


The capacity provisions of conventional Reinforced Concrete (RC) and Prestressed Concrete (PC) beams subjected to combined action of torsion, shear and flexure are well known and stated by international/national codes. Similar provisions lack for concrete members containing Fibre Reinforced Polymer (FRP) reinforcements. In general, there is paucity of research on the treatment of torsion combined with other stress resultants for FRP-RC/PC members. In this paper the theoretical method proposed by the Canadian standard CSA S806 for FRP-RC/PC structures is presented. The critical issues, related to this topic, such as the appropriate strength and inclination of the diagonal struts and failure criteria are critically analyzed and addressed. In order to assess the reliability of this study a comparison between available experimental data regarding FRP-RC/PC beams subjected to combined actions and their corresponding theoretical provisions derived by the CSA S806 standard is shown. Furthermore, another approach, available in literature, which is based on the space truss model, is examined and used for comparison in order to evaluate the theoretical provisions offered by this model against the tests value of the set of the beams analyzed in this study. Based on the critical analysis of the results, it can be highlighted that the CSA method is able to conservatively predict the capacity of these beams.


Keywords


combined actions; FRP bars/tendons; RC/PC members; standards; torsion

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References


AASHTO LRFD (2012). Bridge Design Specifications. American Association of State Highway and Transportation Official, Washington, DC.

Ascione L, Mancusi G, Spadea S (2010). Flexural behaviour of concrete beams reinforced with GFRP bars. Strain, 46(5), 460-469.

http://dx.doi.org/10.1111/j.1475-1305.2009.00662.x

Ascione L, Razaqpur AG, Spadea S (2014). Effectiveness of FRP stirrups in concrete beams subject to shear. Proceedings of the 7th International Conference on FRP Composites in Civil Engineering (CICE 2014).

ACI 440.1R (2006). Guide for the design and construction of structural concrete reinforced with FRP bars. American Concrete Institute, Farmington Hills, MI.

ACI 440.4R (2004). Prestressed concrete structures with FRP tendons. American Concrete Institute, Farmington Hills, MI.

ACI 318 (2011). Building code requirements for structural concrete and commentary. American Concrete Institute, Farmington Hills, MI.

CNR-DT 203 (2006). Guide for the design and construction of concrete structures reinforced with fiber-reinforced polymer bars. National Research Council CNR, Rome, Italy.

CSA A23.3 (2004) (Reaffirmed 2010). Design of concrete structures. Canadian Standards Association, Rexdale, Ontario, Canada.

CSA S806 (2012). Design and construction of building components with fibre-reinforced polymers. Canadian Standards Association, Rexdale, Ontario, Canada.

Collins MP, Mitchell D (1997). Prestressed Concrete Structures. Response Publication, Canada.

Collins MP, Mitchell D, Adebar PE, Vecchio FJ (1996). A general shear design method. ACI Structural Journal, 93(1), 36-45.

El-Awady E, Husain M, Mandour S (2013). FRP-Reinforced concrete beams under combined torsion and flexure. International Journal of Engineering Science and Innovative Technology, 2(1), 384-393.

Elfgren L, Karlsson I, Losberg A (1974). Torsion-bending-shear interaction for concrete beams. Journal of Structural Division, 100(8), 1657–1676.

Eurocode 2 (2004). Design of concrete structures – Part 1-1: general rules and rules for buildings. EN 1992-1-1:2004, European Committee for Standardization.

Fib 40 (2007). FRP reinforcement in RC structures. International Federation for Structural Concrete.

JSCE (1997). Recommendation for design and construction of concrete structures using continuous fiber reinforcing materials. Concrete Engineering, Series 23.

Kanakubo T, Shindo M (1997). Shear behavior of fiber-mesh reinforced plates. Proceedings of the 3rd International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Structures – International Symposium, Sapporo, Japan, October, 2, 317-324.

Kojima T, Takagi N, Uegaki Y (1991). Study on ultimate torque of prestressed reinforced concrete beams with large section subjected to pure torsion. Transaction of the Japan Concrete Institute, 13, 553-560.

Navarro-Gregori J, Miguel-Sosa P, Fernandez-Prada MA, Filippou FC (2007). A 3D numerical model for reinforced and prestressed concrete elements subjected to combined axial, bending, shear and torsion loading. Engineering Structures, 29, 3404-3419.

http://dx.doi.org/10.1016/j.engstruct.2007.09.001

Prabaghar A, Kumaran G (2011). Theoretical study on the behaviour of rectangular concrete beams reinforced internally with GFRP reinforcements under pure torsion. International Journal of Civil and Structural Engineering, 2(2), 570-594.

Rabbat B, Collins MP (1978). A variable angle space truss model for structural concrete members subjected to complex loading. In: International Symposium on Concrete and Concrete Structures. SP-55. Detroit: American Concrete Institute, 547-587.

Ragab KS, Eisa AS (2013). Torsion behaviour of steel fibered high strength self compacting concrete beams reinforced by GFRP bars. International Journal of Civil Science and Engineering, 7(9), 218-228.

Rahal KN (2007). Combined torsion and bending in reinforced and prestressed concrete beams using simplified method for combined stress-resultants. ACI Structural Journal, 104(4), 402-411.

Rahal KN, Collins MP (1999). Background of the general method of shear design in the 1994 CSA-A23.3 Standard. Canadian Journal of Civil Engineering, 26(6), 827-839.

http://dx.doi.org/10.1139/l99-050

Razaqpur AG, Rizzuti L, Bencardino F, Spadea G (2011). FRP-PC members: evaluation of torsional capacity. In ACIC 2011 conference on advanced composites in construction, Warwick, UK, 6-8 September, 319-328.

Razaqpur AG, Spadea S (2014). Shear strength of FRP reinforced concrete members with stirrups. Journal of Composites for Construction, 19(1).

Swamy RN (1962). The behavior and ultimate strength of prestressed concrete hollow beams under combined bending and torsion. Magazine of Concrete Research, 14(40), 13-24.

http://dx.doi.org/10.1680/macr.1962.14.40.13

Zhou P (1997). Mechanical characteristics of prestressed concrete beams and columns with fiber reinforced plastics. Report, University of Hiroshima, Japan.

Yonekura A, Tazawa E, Zhou P, Sumi H (1994). Mechanical behavior of prestressed concrete beams with FRP rods subjected to combined bending and torsional moments. Transaction of the Japan Concrete Institute, 16, 217-224.


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