Characteristics of Fatigue and Evaluation of RC Beam Damaged by Accelerated Corrosion

Performance deterioration of corroded RC beams and reinforcing bars under repeated loading

“…Fang et al [24] experimentally investigated flexural behavior of corroded RC beams under repeated loading regarding corrosion influence on bond strength as the most important factor and indicated that a low corrosion level increased the bond strength between concrete and reinforcing bar. Oyado et al [25] conducted fatigue loading test of corroded RC beams and found that the reduction of fatigue strength was proportionate to the weight loss of reinforcing bar. Yi et al [26] found out that corrosion caused brittle fatigue failure and an increase in degree of corrosion caused a corresponding reduction of fatigue life.…”

Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

“…e other is to consider the corrosion of reinforcement caused by freeze-thaw damage, so the corroded reinforcement is used to manufacture reinforced concrete beams, and the effect of corrosion degree of reinforcement on fatigue performance of reinforced concrete beams is studied. Oyado et al [22] carried out fatigue tests on reinforced concrete beams with different corrosion rates, and Yi et al [23] carried out fatigue tests on corroded reinforced concrete beams and analyzed the relationship between the main reinforcement corrosion and the fatigue performance of concrete beams. Wu et al [24] studied the failure mode, fatigue strength, fatigue life, and deformation performance of corroded reinforced concrete beams under fatigue load.…”

Bending performance of reinforced concrete member deteriorated by corrosion

“…Figure 2 shows the method of the EX, which was conducted near an urban area away from the coast. The specimens were combined together with the specimens for another test (Oyado 2008) by using sandwiched rollers and stainless-steel bars, while holding flexural cracks pre-induced by the static loading open. Three months after exposure began, sodium chloride solution was sprayed on all the EX specimens three times a day for 17 months in an attempt to soak NaCl into the concrete and to accelerate corrosion.…”

“…The EL specimens were planned to have variations of the mass loss of the reinforcing bars so as to make mass loss a testing parameter, and prepared together with the other specimen for the fatigue test (Oyado 2008). Figure 4 shows the experimental setup of the EL accelerated corrosion test, which was intended for every reinforcing bar, including tensile reinforcing bars and stirrups, in order to compare with the EX specimens.…”