Research On Damage Of Concrete Beam In Fatigue Life Under The Action Of Corrosion And Fatigue Load

In coastal areas of port, wharf, bridge and drilling platform in the process of service will be affected by the factors of load and the chlorine salt erosion,This will lead to structure crack, reinforcement corrosion, causing the structure for belt damage state. Especially for the vehicle load under the structure of the fatigue life under the combination of corrosion and fatigue will be greatly shortened, eventually led to the structure being far from design the use fixed number of year of fatigue damage. This article has carried on the long-term under constant load of damaged reinforced concrete beam under the chlorine salt corrosion environment and fatigue load of fatigue test, the main work includes:(1) After long-term constant load test, test and evaluate the material properties of reinforced concrete beam, appearance defects, cracks, test results show that the load beam crack width in normal use limit and no corrosion cracks.(2) The chlorine salt doped with damage of concrete beam fatigue test. Studied the mixing of chlorine salt on the fatigue life of concrete beam and failure pattern,Comparing chlorine salt doped with ordinary concrete beams deflection and crack of concrete beams along with the development of The Times of fatigue.(3) The damage of the concrete beam alternating corrosion and fatigue test.Studies the fatigue life and deflection of beam and changing with the number of fatigue fracture.Corrosion and fatigue are analyzed under the action of alternating fatigue damage and the influence of the corrosion damage of beam fatigue life(4) Through the electron microscope scanning test of reinforced fracture after fatigue damage, the micro-structure of the fatigue crack are analyzed.