Mechanical Properties And Engineering Application Of Repairing And Strengthening Concrete Members With Carbon Fiber Reinforced Plastic

Recently, the application of fiber reinforced composites in civil engineering is now a hot sport in the research and development of the international civil engineering field. With the technical maturity of the carbon-fiber-reinforced plastic (CFRP), CFRP has become the most widely applied composite materials for the rehabilitation and retrofit of reinforced concrete members. This paper mainly introduces technologies of bending carbon fiber reinforced plastic (CFRP) plates or fabrics to the web of reinforced concrete members , and also this paper discusses the design principles of carbon fiber reinforced plastic(CFRP) used in the reinforced concrete members, as well as considering the preload effect to the bending capacity of the reinforced concrete members. Finally , a kind of new practical method is put forward ,and may be a reference for practical engineering designer .In the meantime ,this paper analyzes the "local failure" caused by shear and normal stress concentrations at the plate ends that can easily incorporated into design equations .Furthermore ,the bonding and anchoring conformation of concrete members strengthened by carbon fiber reinforced plastics also be set forth.In 21st century, with the development of national-produced process and product technology of carbon fiber reinforced plastic(CFRP), no doubt, CFRP strengthening technique will bring huge economic profit to our society. So it is very important to study the design principle and method and construction technology of this new fiber-reinforced composites.