Location
Faculty of Civil Engineering and Mechanics, Jiangsu University
Keywords
eccentric compression; concrete beam; chloride ion transmission; numerical simulation
Abstract
In order to deal with the chloride ion transportation mechanism in eccentric compressive concrete pier and column in marine environment, stress distribution in the section of eccentric compressive concrete specimen was analyzed firstly, relationship between chloride diffusion coefficient and stress level was developed according to porosity varying under different loads, at last a model of chloride diffusion coefficient under varying stress level was developed. Conversion-diffusion equation in COMSOL Multiphysics was used in this paper to calculate the chloride ion transportation process. Three test beams with different mixture were cast and then loaded to different stress level. After that, all of the specimens were exposed in chloride solution. Chloride profiles at different depth of concrete after 180d and 540d’s exposure were detected and used to verify the simulated results. The error between the simulated value and the test value was within the acceptable range, which showed that the calculation model and simulation process of chloride ion diffusion coefficient were reliable. Theoretical foundation was developed in this paper for the chloride profile and service life prediction of compressive concrete component exposed in chloride environment.
Included in
Investigation of chloride transportation mechanism in reinforced concrete specimen subjected to eccentric compression
Faculty of Civil Engineering and Mechanics, Jiangsu University
In order to deal with the chloride ion transportation mechanism in eccentric compressive concrete pier and column in marine environment, stress distribution in the section of eccentric compressive concrete specimen was analyzed firstly, relationship between chloride diffusion coefficient and stress level was developed according to porosity varying under different loads, at last a model of chloride diffusion coefficient under varying stress level was developed. Conversion-diffusion equation in COMSOL Multiphysics was used in this paper to calculate the chloride ion transportation process. Three test beams with different mixture were cast and then loaded to different stress level. After that, all of the specimens were exposed in chloride solution. Chloride profiles at different depth of concrete after 180d and 540d’s exposure were detected and used to verify the simulated results. The error between the simulated value and the test value was within the acceptable range, which showed that the calculation model and simulation process of chloride ion diffusion coefficient were reliable. Theoretical foundation was developed in this paper for the chloride profile and service life prediction of compressive concrete component exposed in chloride environment.
