ANALYSIS ON LOAD CARRYING CAPACITY OF THE CORRODED REINFORCED CONCRETE BEAM AFTER CYCLIC LOADING WITH DIFFERENT STRESS RATIO

摘要

It is significant to research the change of real load carrying capacity of the corroded reinforced concrete members after cyclic loading with different stress ratios for research on the coupling effect between steel corrosion and cyclic loading and structural safety.ABAQUS software is adopted to numerically simulate the influence of the stress ratio of cyclic loading and steel corrosion by modifying section area and strength of the steel bars.Non-linear static analysis of the corroded reinforced concrete simply-supported beam with different corrosion rates under cyclic loading with different stress ratios are carried out.From the results,some conclusions can be given.The stress ratio of cyclic loading obviously affects the yield load of corroded simply supported reinforced concrete beam,and the effect extent of stress ratio to the yield load is higher than that of steel corrosion rate.When the stress ratio of cyclic loading is small,it obviously affects the ultimate deflection of reinforced concrete beam.When the stress ratio becomes larger,the effect of stress ratio on the ultimate deflection becomes weak.Also,the effect extent of stress ratio on the ultimate deflection is identical to steel corrosion rate.The effect of corrosion rate's increasing on the yield load does not change as the stress ratio varies.But,the effect extent of variations of corrosion rate on the ultimate deflection is related to the stress ratio.