Experimental Study On Corroded Reinforced Concrete Beam Joint Under Cyclic Loading

Abstract:Reinforcement corrosion in concrete structure seismic performance dropped singnificantly. But the study on the concrete specimen seismic durability made in domestic and foreign countries is less. The studies mainly focus on longitudinal reinforcement corrosion. The paper combine with the national natural science funds "Seismic durability research of reinforced concrete structures",through the experimental study on the stirrup corrosion influence seismic performance of the joints. The main work of thesis is as follows:1、According to orthogonal principle design14groups of corroded reinforced concrete beam specimens,parameters for design change:stirrup corrosion ratio、stirrup ratio、reinforcement ratio;2、through electrochemical corrosion method which get steel corrosion rate of the joints, experimental results verify the validity of Faraday’s law which instruce corrosion steel test;3、Exmperment research feateres of the corroded reinforcement concrete beams joints.Including corroded reinforcement concrete beams joints failure pattern、load-displacement hystertic curves、skeleton curves、corroded reinforced strain change;4、Base on corroded reinforced concrete beam jionts under low cyclic loading experiment, analysis the performance of corroded reinforced concrete beam joints which is flexural bearing capacity, ductility and energy dissipation capacity. Get stirrup corrosion ratio、stirrup ratio on bearing capacity of corroded reinforced concrete beam joints which is hysteresis ductility influence law and relevant expressions.