Research Of Flexural Capacity About RC Beam Reinforced With Hybrid Fiber Sheet

The character of sole carbon fiber reinforced concrete structures is that carbon fiber has good intension, low extension and high price; The character of sole glass fiber reinforced concrete structures is that glass fiber has good extension ,low price and low intension. In terms of the characters of carbon fiber and glass fiber, a plan of strengthening concrete structures with hybrid fiber(composed of carbon fiber and glass fiber) was proposed in this article.The project of experiment is to produce ten RC beams and to affix reinforced materials of different kinds and different amount to the bottom of beams. We can draw a conclusion include yielding load, limit load, middle displacement, load-strain curves of reinforcing steel bar and reinforced materials, destroy configuration and strain distributing of section in beam side. Comparison and analyse are made in terms of experiment results.It is shown that beams of reinforced average strain distributing accord with flat section assume; The method of strengthening intension of concrete structure with reinforced materials (carbon fiber, hybrid fiber) is a feasible way. The strength of beam can be increased with the number of reinforcement materials be added; The strength of beam is affected by percentage of flexural reinforcement and the compound proportion and fashion of reinforcement materials and the number of reinforcement materials; The capability of bend and stretch and price of inner hybrid fiber is better than sole fiber and exterior hybrid fiber.The ultimate flexural capacity of the beam is calculated by using simplified formula. Analysis and comparison is done between the experiment data and calculate data, and test results are agree with calculate results. At last ,all kinds of factors affect reinforced impact are discussed.