Deterioration and evaluation method of Mechanics Behavior of Reinforced Concrete Column under Sulfate Attack

摘要

This paper has studied the reinforced concrete eccentrically compressed members through the laboratory accelerated corrosion method, which has been also combined with the continuous damage theory to give a preliminary definition of the damage degree of concrete uniform corrosion. The study has shown that with the increase of concrete corrosion layers, the bonding properties of steel and concrete keeps falling. With the increase of damage degree, the concrete will be advanced into the compression and the steel can't fully exert its tensile properties. The bearing capacity of large and small eccentric hydraulic components will be decreased with the increase of damage degree. With the increase of damage degree, the neutral axis of concrete compressed column will shift to the eccentric point, which can make the eccentricity become small. No matter the unilateral corrosion or the peripheral corrosion, the column deflection is proportional to the damage degree and the column stiffness will be decreased with the increase of corrosion layers.