Volume 25 Issue 5
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LIN Yu-han, CHEN Li-bo, XING Zhi-quan, CHEN Yu. Prediction of full-life axial compression performance of steel-reinforced concrete bridge piers in marine environments[J]. Journal of Traffic and Transportation Engineering, 2025, 25(5): 368-384. doi: 10.19818/j.cnki.1671-1637.2025.05.024
Citation: LIN Yu-han, CHEN Li-bo, XING Zhi-quan, CHEN Yu. Prediction of full-life axial compression performance of steel-reinforced concrete bridge piers in marine environments[J]. Journal of Traffic and Transportation Engineering, 2025, 25(5): 368-384. doi: 10.19818/j.cnki.1671-1637.2025.05.024
shu

Prediction of full-life axial compression performance of steel-reinforced concrete bridge piers in marine environments

doi: 10.19818/j.cnki.1671-1637.2025.05.024
  • 1.

    College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China

  • 2.

    Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

  • 3.

    International and Hong Kong, Macao and Taiwan Connection Laboratory of Structural Engineering, Fuzhou University, Fuzhou 350116, Fujian, China

Funds:

National Natural Science Foundation of China 52078138

Science and Technology Plan Project of Housing and Urban-Rural Construction Industry of Fujian Province 2022-K-298

Science and Technology Plan Project of Housing and Urban-Rural Construction Industry of Fujian Province 2023-K-71

More Information
  • Corresponding author: CHEN Li-bo (1984-), male, associate professor, PhD, lbchen@fzu.edu.cn
  • Received Date: 2025-02-16
  • Accepted Date: 2025-08-22
  • Rev Recd Date: 2025-06-14
  • Publish Date: 2025-10-28
    Abstract
  • To improve the durability and performance prediction accuracy of bridge structures in marine environments, the initial corrosion time of embedded steel in steel-reinforced concrete (SRC) bridge piers in marine environments was determined based on a semi-empirical time-dependent corrosion model. By analyzing the time-dependent degradation laws of the cross-sectional area and yield strength of reinforcement in marine environments, a quantitative characterization method for the time-varying corrosion rate and mechanical performance degradation of section steel was proposed. Based on the calculation results of the time-dependent corrosion model, 11 SRC bridge pier specimens with different service years were fabricated. Through electrochemical accelerated corrosion tests and axial compression performance tests, the failure modes and time-dependent degradation behavior of SRC bridge piers under axial load after corrosion damage were systematically investigated. Through theoretical analysis and derivation, a time-dependent axial compression bearing capacity prediction formula for SRC bridge piers in marine environments was proposed, and the rationality of the formula was verified by experimental data. Research results show that the thickness of the protective layer significantly affects the initial corrosion time of the steel, and the degradation rate of the steel performance is influenced by both service time and corrosion current density. As the service time increases, the axial compression performance of the bridge piers deteriorates significantly. The ultimate bearing capacity, ductility, and initial stiffness of SRC bridge piers decrease by 54.1%, 54.3%, and 68.2%, respectively, during the full-life cycle. The degradation inflection points of ultimate bearing capacity and initial stiffness occur at 20 years of service, while the ductility degradation inflection point is delayed to 50 years. Based on the proposed formula, the relative error in predicting the full-life axial compression bearing capacity of the experimental bridge piers is within 6%, lower than the prediction error of existing national standards. This indicates that considering the coupling effect of concrete cracking and the confinement effect of corroded steel can significantly improve the prediction accuracy of the full-life axial compression performance of SRC bridge piers.

     

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