CIRIA C595 - Strengthening Metallic Structures using Externally-Bondded FRP

Strengthening metallic structures using externally-bonded fibre-reinforced polymers (FRPs) is a young and rapidly developing technique. It allows extension of the lives of structures that are deficient due to corrosion, fatigue, damage, or where a change in use is required. Many of the applications of FRP to metallic structures have been in the UK, where a number of cast-iron and steel bridges and buildings have been strengthened. CIRIA report C595 describes current best-practice in the technique, and was published in February 2004. This paper gives a general overview of the report. C595 addresses the complete life-cycle of an FRP strengthening scheme for a metallic structure, from conception, through design, procurement, installation and maintenance, to decommissioning. It provides guidance for clients and owners of structures; design consultants; installation contractors; and manufacturers and suppliers of FRP strengthening systems. Issues of particular importance when strengthening metallic structures using FRP include an adequate understanding of the materials involved, sectional design that includes the effects of locked-in permanent stress, the capacity of the adhesive joint, temperature effects, a high quality
installation, and the post-installation inspection regime. C595 is a comprehensive design guide that draws together wide-ranging experience, but it is careful to recognise that research on this subject is ongoing.