21 - Advanced fiber-reinforced polymer (FRP) composites for the rehabilitation of timber and concrete structures: Assessing strength and durability

Abstract

The use of bonded composite systems in the building industry is increasing, particularly in the context of on-site rehabilitation of timber and concrete structures, where this technology has been consistently gaining widespread acceptance. However, in spite of the intense research conducted over the past three decades, nowadays, the exploitation of their full potential is still often restrained by the lack of structural design guidance, standards for durability assessment and on-site acceptance criteria and testing. Therefore, this chapter provides an up-to-date review of the current understanding on the use of hybrid bonded composite systems on the construction site in terms of structural repair, reinforcement, and seismic retrofit; focusing the requirements and practical difficulties in the work on-site with regard to the performance and durability of the rehabilitated structure, the characteristics and requirements that must be fulfilled by structural adhesives and advanced polymer composite materials, and the subsequent need for quality control and in-service monitoring. It also highlights the factors affecting performance and durability of bonded joints. Finally, a general overview of the current research needs and bibliography proving references to more detailed information on this topic is given.