Research On The Durability Of R.C. Special-Shaped Column

Reinforced concrete structures is the structure form that the country applies most broadly in infrastructure construction. As concrete carbonation, chlorine ion erosion, such as freezing- thawing, leading to corrosion of reinforced concrete structure, with reinforcement damage and concrete spalling and other damage, which has become the main issues of durability of concrete structures. The losses caused by the lack of the durability of concrete structures, have far exceeded expectations, and the peak of the infrastructure in our country, if we do not fully recognizing the importance of durability, then the losses will restrain China's economy as a whole, healthy and rapid development.Along with the development of city construction, appeared a lot of new buildings structure form, R.C, frame structure with special-shaped column is one of them, the structure's form gets the expansion with apply in our country many cities with its advantage of not appearing column edges indoors, being easy to arrange furniture, extends effective areas of the room. Because of good architectural function, R.C. frame structure with special-shaped columns has got relatively extensive application in the recent years. However, as a kind of comparatively new structural system, the study of experiment and theoretical analysis on durability has shortages.In this article, by the method of theoretical analysis, we use ANSYS to set up numerical modeling, based on the achievement of special-shaped column experiment recently in our country, setting up model which is realistic and easy to analyze, considering some factors effecting the durability (alkali-aggregate reaction and protective layer thickness mainly here), we try to analyze its bearing capacity of special-shaped columns after durability degeneration, then tender constitution measures to ensure durability of special-shaped column, and look into the distance of the special-shaped column concrete structure.