Abstract: An investigation of the structural behavior and corrosion resistance of hybrid fiber reinforced polymer (FRP) wrapped steel reinforcement bars for use in reinforced concrete structures. The investigation is comprised of a bar analytical model using laminate theory, an in-depth analytical model for reinforced concrete sections, and a series of experimental tests to assess the structural performance and corrosion resistance of the composite bars. A comparison between the analytical model and experimental results was conducted and general design guidelines developed. Using these guidelines, sample designs were completed using hybrid bars, stainless steel bars, and standard epoxy coated steel reinforcing bars. The designs were compared and a life cycle cost (LCC) analysis was performed to assess the economic advantages or disadvantages of the hybrid bars. Conclusions and recommendations for standard practice and design and future research are then presented.

Corrosion-resistant, electromagnetic transparent and lightweight fiber-reinforced polymers (FRPs) are accepted as valid alternatives to steel in concrete reinforcement. Reinforced Concrete with FRP Bars: Mechanics and Design, a technical guide based on the authors more than 30 years of collective experience, provides principles, algorithms, and pr

Corrosion presents one of the greatest threats to the durability of reinforced concrete structures, yet it is also one of the least understood components of the design process for most engineers. The nation's infrastructure is rapidly deteriorating due to years of abuse and fatigue. Therefore, several economic and reliable solutions have been developed to repair the existing damage and extend the design life of structures at risk of corrosion. One popular method for protecting concrete structures from corrosion is the use of fiber-reinforced plastic (FRP) composite wraps. The premise is a simple one: placing an impermeable barrier around the surface of the concrete should prevent harmful substances such as chlorides from entering and corroding the imbedded reinforcing steel. However, little is known about the long-term effectiveness in preventing corrosion in reinforced concrete structures. The FRP wrap may in fact prevent the chlorides from passing through the concrete, however, the same principle might cause chlorides to be trapped beneath the surface and accelerate corrosion. In this study, the long-term behavior of laboratory specimens exposed to an aggressive chloride-rich environment were examined. This project was designed to develop a greater understanding of the long-term effects of FRP wrapping in preventing corrosion in reinforced concrete structures. Although TxDOT project 0_1774 involves both rectangular and cylindrical specimens, the focus of this thesis is on the specific impact of FRP wraps on partially wrapped versus unwrapped columns. The specimens included in this study are comprised of a wide range of construction parameters. However, despite the multitude of varying mix designs a noticeable trend has emerged as a result of this research.

"In 1993, the CEB Commission 2 Material and Behavior Modelling established the Task Group 2.5 Bond Models. It's terms of reference were ... to write a state-of-art report concerning bond of reinforcement in concrete and later recommend how the knowledge could be applied in practice (Model Code like text proposal)... {This work} covers the first part ... the state-of-art report."--Pref.

The use of fiber reinforced plastic (FRP) composites for prestressed and non-prestressed concrete reinforcement has developed into a technology with serious and substantial claims for the advancement of construction materials and methods. Research and development is now occurring worldwide. The 20 papers in this volume make a further contribution in advancing knowledge and acceptance of FRP composites for concrete reinforcement. The articles are divided into three parts. Part I introduces FRP reinforcement for concrete structures and describes general material properties and manufacturing meth.