Test Research On The Flexural Resistance Of Post-Tensioned Prestressing Without Bond Concrete Beams By CFRP Tendons

The reinforced concrete structure owns good durability in normal environmentin case of proper design and reliable construction. However, the performance and endurance of the structure will be affected due to tbe corrossion of the steel tendons if the above requirements are not met. To solve the problem, several effective ways have been found, one of which is the application of Carbon Fiber Reinforced Plastic (CFRP) tendons. The way proves to be reliable at present. CFRP tendon is a new composite material manufactured by special technology, it has many advantages such as high-strength, low-density, better corrosion-resistance and so on, so it can replace steel tendons in normal concrete structures and prestressed concrete structures.This paper describes flexural resistance test that CFRP tendons are used as prestressing without bond tendons in post-tensioned concrete beams subjected to equal span three-point under vertical loads. It also introduces the development of the the prestressing anchorage and analyzes the prestressing loss in the tension process , stress process and load-deflection relationship of the post-tensioned concrete prestressing without bond concrete beams by CFRP tendons. The flexural strenght of the tested beam is calculated. And some conclusions of the test are given. In addition, we conduct the simulation analysis with software ANSYS on the CFRP tendons concrete beams subjected to equal span three-point under vertical loads, and we can get detailed results.The conclusions of the paper are based on the CFRP tendonsproducts. And the related study methods and some conclusions will givereference to the further research.