Deterioration of Tunnel Concrete Caused by Chloride Ion Penetration Based on Fluid-Solid Coupling Analysis
Chloride ion leads to corrosion of steel embedded in concrete, which causes performance degradation of reinforced concrete structures.Corrosion of steel also plays an important role in crack propagation of concrete structures.The profiles of chloride ion penetration in concrete structures vary significantly depending on initial penetration pressure and concentration.The submarine tunnels and immersed tunnels in service are exposed to severe environments of high water pressure and high concentrations of oxygen and chloride ion.The porosity distribution of concrete is changed under the effect of high water pressure, which influences the penetration of chloride ion accordingly.Therefore, the corrosion rate of steel in concrete also may vary.In this paper, the transient seepage model of concrete based on fluid-solid coupling analysis is established to study the law of seepage velocity and the distribution of chloride ion concentration under their coupling effects.This study is of great significance for deterioration prediction and maintenance management of underwater tunnels subjected to high water pressure in the service stage.
Underwater Tunnel Concrete Chloride Ion-Induced Corrosion Fluid-Solid Coupling High Water Pressure Seepage velocity
Y.F.Zhang H.Yokota Y.L.Zhu
Hokkaido University, Sapporo, Japan
国际会议
福州
英文
603-611
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）