Flexural Design of Prestressed Concrete Beams Using FRP Tendons

Abstract

Fiber Reinforced Polymer (FRP) tendons are being considered for design in structures exposed to aggressive environments or where non-metallic properties are desired. FRP tendons require considerable attention to detail during the design process. This paper presents a unified approach for the flexural design of beams with FRP tendons. Equations for flexural strength are presented, failure modes are defined, calibrations with test data are presented, and strength reduction factors are recommended. A test program validates the design approach and provides some serviceability data. Conclusions from the test program and design recommendations are provided.

Deflection Behavior of Prestressed Concrete Beam using Fiber Reinforced Polymer (FRP) Tendon

“…Abdelrahman, 1995 stated that FRP beam deformability shall be calculated by the ratio of deflection of beam considering as un-cracked stiffness at a load equal to ultimate load and to the deflection due to ultimate load considering the cracked stiffness. Dolan and Burke, 1996, and Chad, 2001 [16,17] proposed a simplified method for calculating deformability by strain approach. ACI 440-4R, 2011 amended their strain approach.…”

Advanced fibre-reinforced polymer (FRP) composite materials in bridge engineering: materials, properties and applications in bridge enclosures, reinforced and prestressed concrete beams and columns

“…a number of studies have been undertaken into the rehabilitation of prestressed concrete (PC) and cable stay bridges utilising prestressing bars and tendons manufactured from FRP composites (arockiasamy et al, 1996;Fam et al, 1997;Shehata et al, 1997;Rizkalla et al, 1998;Grace (1999Grace ( , 2000; Lu et al, 2000). Burke and Dolan (2001) undertook experimental studies on certain Canadian precast concrete bridges that had been upgraded using prestressed FRP composite tendons and presented the advantages of this system for upgrading. Nordin (2004) has reviewed a number of existing concrete bridge girders which have been rehabilitated and strengthened with external FRP tendons.…”

Modelling of load–deflection of concrete beams internally prestressed with unbonded CFRP tendons

“…Although much experimental and theoretical research has been conducted for characterising the flexural behaviour of concrete beams prestressed with bonded FRPs (Burke and Dolan, 2001;Dolan and Swanson, 2002;Ehsani et al, 2001;Naaman et al, 1993;Yonekura et al, 1993), fewer studies have been conducted on concrete beams prestressed with unbonded FRPs (Grace et al, 2006(Grace et al, , 2008Heo et al, 2013;Kato and Hayashida, 1993;Maissen and de Smet, 1995). To gain a better understanding of the flexural behaviour and practical application of such beams, it seems necessary to develop a theoretical model that can incorporate the properties of both concrete and reinforcing materials and member-dependent tendon strains in the simulation of the non-linear flexural behaviour of these beams.…”