Zhang, Kai; Zhang, Mingzhong; Long, Xuyou; Huang, Tingjie; Yan, Ruipeng; Zhang, Yonggang; Yuan, Qiang; (2025) Damage progression of offshore-corroded round-ended piers under long-term solar radiation and ambient temperature cycles. Engineering Failure Analysis , 168 , Article 109067. 10.1016/j.engfailanal.2024.109067.

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Abstract

Offshore infrastructure concrete might be damaged under long-term fluctuations of ambient temperature and solar radiation. However, the damage evolution of offshore infrastructure during long-term environmental influences remains unclear, due to the lack of appropriate analytical methodologies. In this article, a novel numerical methodology is suggested based on the damage mechanics and thermodynamic mechanics. The long-term (100-year) degrading behavior of corroded RC piers under solar radiation and ambient temperature cycles is then investigated. The findings suggest that the corrosion of steel rebar accelerates the deterioration of bridge piers under long-term solar radiation and ambient temperature cycles. Nonlinear temperature gradients in corroded RC solid piers may cause the pier surface concrete to crack. As the exposure time rises, tensile damage (the ratio between the fracture area and the initial area) of pier concrete increases. The greatest tensile damage of pier concrete is 0.357, 0.401, and 0.478 after 1, 10, and 100 years of exposure, respectively. Moreover, short-wave absorption-reducing technology and controlling concrete thermal properties may mitigate the deterioration of corroded RC piers.

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