• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
XIE Mingzhi, FAN Dingmeng, JIANG Zhipeng, DENG Fei, WANG Kun, HAN Chen, YANG Yongqing. Research Status and Prospects of Computer Vision-Based Crack Detection of Concrete Structure[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240115
Citation: ZHANG Yunguo, ZHANG Junjun, HAN Yue. Characteristics of Chloride Ion Permeation in Concrete of Type Fracture Crack Propagation[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1047-1054. doi: 10.3969/j.issn.0258-2724.20200741

Characteristics of Chloride Ion Permeation in Concrete of Type Fracture Crack Propagation

doi: 10.3969/j.issn.0258-2724.20200741
  • Received Date: 03 Nov 2020
  • Rev Recd Date: 06 Apr 2021
  • Available Online: 01 Sep 2022
  • Publish Date: 07 Apr 2021
  • To explore chloride ion erosion in the crack propagation process of concrete structures under loads, and more accurately describe the characteristics of chloride ion erosion around cracks at different stages, the development process of concrete trabeculae type Ⅰ fracture, based on the concrete fracture criteria, was simulated by self-programming, and redeveloped by ANSYS parametric design language APDL. Given the mapping relationship between volume strain, damage variable and chloride ion diffusion coefficient, the parameter equivalence method and the structure-thermal analysis method are used for numerical analysis of chloride ion erosion at various stages of concrete crack propagation. The results show that chloride ion erosion around the crack of a three-point bending concrete trabecular is consistent with the experimental one at different crack-expanding stages. The chloride ion erosion at the crack tip of concrete is intensified under loads; therefore, it plays a decisive role in the durability life analysis of concrete structures. Furthermore, the double-K fracture criterion and the chloride ion diffusion model based on damage parameters can simulate the chloride ion erosion in the concrete cracking process.

     

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