Strength of circular concrete columns reinforced with FRP bars and spirals

Abstract

Circular cross section reinforced concrete columns are often used in structures of buildings, ports or bridges. Generally, for the installment of these constructions metal/steel reinforcement is being used. Corrosion of steel reinforcement is the main and one of the biggest problems reducing the durability of these structures and it is a reason of fragile disintegration of these structures. In the current period, the composite reinforcement is an alternative material for the production of reinforced concrete structures the mechanical characteristics of which are equal to or even better in comparison of the commonly used steel reinforcement characteristics, including tensile strength and resistance to corrosion at the extremely aggressive environment. Due to the lack of the researches, many design standards do not indicate or recommend the use of composite reinforcement in compressive elements or flexural elements in compressed zones. This article analyzes the possibilities of the use of composite reinforcement in axially crushed circular cross section columns.