Experimental Analysis Of RC Beams Prestressed Reinforced Carbon Fiber

The rapid development of science and technology in today’s society, drives the rapid development of China’s economy.At the same time,People’s living standards have a greater degree than in the past leap,they have a higher level of pursuit of residential building safety, comfort, durability, functionality, aesthetics.Second,The old design criteria and construction standards no longer meet current building requirements.Reinforcement and restoration of existing buildings to increase its applicability and aesthetics becomes particularly important.On the other hand,the founding of the pre-construction houses which have been in service for over half a century, has been close to its life that are unable to guarantee safety,in order to extend its life and improve its safety, we need to reinforce the repair of these buildings.In addition,buildings whose quality no longer meet the requirements due to design problems or problems caused by the construction also need reinforcement and restoration.In addition to the above,there have been a variety of problems on many bridges in use for many years which has become dangerous bridges,only be reinforcing can we further improve its carrying capacity and extend its life.In summary,the study of methods for reinforcement and reinforcement technology has important significance.In order to study the mechanical properties of concrete beams reinforced by new materials carbon fiber,including reinforcing effect on the beam stiffness, ductility, fracture-controlled,this paper presents three test beams,one of no treatment as a comparison beam,an ordinary carbon fiber reinforced one,a prestressed carbon fiber reinforced one.Meanwhile we design a more reliable tensioning equipment and we has developed a more complete tensioning process.By reinforcing processes and Static loading test, recording strain deflection and crack development,we do in-depth study of comparison chart on the strain, deflection comparison chart, the strain load diagrams.And conclusions are as follows:Reinforcement has an increase for beams cracking load,although the increase is not obvious.Magnitude of the ultimate load increase are larger,and magnitude of beams reinforced by prestressed carbon fiber are larger than ordinary carbon fiber;The higher the concrete strength, the less likely debonding;Prestressed carbon fiber is better in increasing the stiffness、reducing the ductility、inhibit crack development of the beam;Anchorage effectively delay the debonding the carbon fiber from the beam, which greatly improves the ultimate bearing capacity of the beam.