关键词: 剪应力;加载方式;氯离子侵蚀;扩散系数

Abstract: In actual engineering, the concrete structure is subjected to normal stress and shear stress, which accelerates the deterioration of durability.However, the law of chloride ion transport under shear stress in concrete structures is rarely reported.The concrete beams were subjected to long period shear loading by innovative loading method.The law of chloride ion transport under shear stress in concrete structures was studied.The results show that shear would increase the permeability of the concrete structure, with the increasing of load level, chloride ion diffusion coefficient increased.Finally, based on the experimental datum, the mathematical model of chloride diffusion coefficient of concrete specimens under shear stress state is established, and the effect of shear stress on the diffusion coefficient of chloride ion in concrete is analyzed.

Key words: shear stress;loading method;chloride ion erosion;diffusion coefficient