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Calculation method for the service life of Chinese historical reinforced concrete buildings
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Almost all of the existed studies on the corrosion of rebars were based on round-section rebars. However, the square-section steel rebars were widely used in China from 1912 to 1949, and there was no specific calculation model or durability assessment method for this type of historical buildings. In this study, based on the original configuration design of this kind of structures, the experiments of the corrosion-induced cover cracking of a certain number of reinforced concrete members with square-section rebars were carried out with the electrochemical acceleration method. The average rust depths of the square-section rebars at the critical corrosion-induced cover cracking moment were obtained. Then, the calculation method of critical rust depth of steel rebars at the concrete cover cracking moment was presented with data fitting method. Finally, combining with predication of carbonization life of concrete, a calculation method of the service life for Chinese historical RC buildings using square-section rebars was proposed. The research results can provide the basis for the durability assessment and conservation for Chinese historical RC buildings.
Title: Calculation method for the service life of Chinese historical reinforced concrete buildings
Description:
Almost all of the existed studies on the corrosion of rebars were based on round-section rebars.
However, the square-section steel rebars were widely used in China from 1912 to 1949, and there was no specific calculation model or durability assessment method for this type of historical buildings.
In this study, based on the original configuration design of this kind of structures, the experiments of the corrosion-induced cover cracking of a certain number of reinforced concrete members with square-section rebars were carried out with the electrochemical acceleration method.
The average rust depths of the square-section rebars at the critical corrosion-induced cover cracking moment were obtained.
Then, the calculation method of critical rust depth of steel rebars at the concrete cover cracking moment was presented with data fitting method.
Finally, combining with predication of carbonization life of concrete, a calculation method of the service life for Chinese historical RC buildings using square-section rebars was proposed.
The research results can provide the basis for the durability assessment and conservation for Chinese historical RC buildings.
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