Mechanical Properties Of Corroded Reinforced Concrete L-shaped Column

Corrosion caused by degradation of the performance of reinforced concrete structures has become a major issue in civil engineering sector,which causes people’s widespread concern. In recent years, people have made a large number of research in conventional components (rectangular section)and acquire a lot of valuable results,but few people research in the corrosion of reinforced concrete special-shape columns. Base on the finite element to analyze the performance of the eccentric bearing capacity of corroded reinforced concrete L-shaped columns and to analyze mechanical properties of the integrity and corroded reinforced concrete L-shaped columns at different axial and different load angle some problem are researched in the paper as follows:(1) Studied on eccentric compression property of the corrosion reinforced concrete L-shaped column,the results show that due to the corrosion of steel bar,the steel section decrease and reinforced steel and concrete bonding performance degradation reduced the bearing capacity and rigidity of component. Large eccentric compression bearing capacity decreased severe than the small eccentric component, while the eccentric component of the carrying capacity changed little; Because the corrosion make reinforced steel and concrete bonding performance degrade, Cross-section of the large eccentric compression component does not meet the plane section assumption, but little effect on the stress and strain of the cross-section of the small eccentric compression components.(2)By controlling the axial compression ration and loading angle to analyze the mechanical behavior of intact wide flange L-shape column, the results show that0°loading angle of the bearing capacity of the best, but its ductility is the worst and the capacity of45°loading angle minimum, but ductility is the best; Loading angle and axial compressive has little effect on torsional deformation of the wide flange L-shape column.(3)Through the analysis of the wide flange L-shape column under different loading (00、22.50、450) and different axial compression ration function, corrosion of longitudinal reinforcement influence on the performance of the component. The results show that when loading more than L column cracking load and with the increasing of steel corrosion, the bearing capacity of the component,stiffness of the component, ductility of the component are reduced and so on. According to the above study, the degradation of the law of the skeleton curve control points are given with the steel corrosion rate changing.This thesis is supported by National Natural Science Foundation of China(50978166).