Research On Methods For Evaluating The Durability Of Concrete Members Strengthened With CFRP

Since the 1950s, China started large-scale civil engineering construction. In the long-term environmental erosion, degradation of material properties and safety of the reinforced concrete structures is reduced; it is difficult to achieve the desired service life or function, the need for reinforcing its structure member. CFRP reinforcement is an important and common approach. During extended use, CFRP reinforced concrete structures are still affected by the environment. Assessment of the durability of reinforced concrete structures has important significance for the reliability of the reinforced structural system. Through theoretical analysis and durability test, it is proposed evaluation method of CFRP Reinforced Concrete, the main contents are as follows:Firstly, it is analyzed of the factors affecting the durability of CFRP Reinforced Concrete; It summarizes the CFRP sheet, structural adhesives, the durability of the mechanism of various types of concrete structures environment; It describes the key steps CFRP construction elements and quality inspection of reinforced concrete members; It summarizes the assessment of the durability of CFRP-reinforced concrete content of each component.Secondly, it describes the testing method for evaluation of durability, By resistance to environmental effects, resistance to stress, quick test means resistance to erosion of media, Durability of CFRP key indicators-reinforced concrete test analysis, to assess the effect of various conditions for its durability impact.Finally, according to the durability of the indicators, it is established evaluation method which is CFRP gluing durability evaluation method of the reinforcing member. The method according to the performance of various types of test data under aging conditions and not subjected to the aging condition of the test data were compared, Evaluation of performance durability to reduce the rate of damage to or destruction of the state of the material. Based on concrete positive tensile bond strength, layer hardness, bonding compactness, corroded steel and concrete carbonation durability structural system to be assessed.And a reinforced concrete frame structure underground garage as an engineering example, which is verified the rationality and feasibility established by the durability evaluation method.The results shows that, Thesis established CFRP gluing durability evaluation method of reinforced concrete elements, of durability of the components of the reinforcing member to be assessed Provide reference and basis for the durability of concrete reinforcement system to monitor the use phase.