Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact
RC piers in mountainous coastal or saline areas face the dual threats of rockfall impacts and chloride-induced steel corrosion, but their combined effects on dynamic response and residual bearing capacity remain unquantified. This study aims to investigate these combined effects over a 90-year servi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/15/2592 |
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| author | Jieqiong Wu Feiyang Ye Jian Yang Jianchao Xu |
| author_facet | Jieqiong Wu Feiyang Ye Jian Yang Jianchao Xu |
| author_sort | Jieqiong Wu |
| collection | DOAJ |
| description | RC piers in mountainous coastal or saline areas face the dual threats of rockfall impacts and chloride-induced steel corrosion, but their combined effects on dynamic response and residual bearing capacity remain unquantified. This study aims to investigate these combined effects over a 90-year service time and propose a damage assessment formula. A validated numerical model (relative error ≤14.7%) of corroded RC columns under impact is developed using ABAQUS, based on which the dynamic response and residual bearing capacity of an actual RC pier subjected to rockfall impacts during the service time of 90 years incorporating corrosion initiation (via Life-365 software 2.2) and propagation are analyzed, with the consideration of various impact energies (1–5 t mass, 5–15 m/s velocity). Results show that (1) increasing impact mass/velocity expands damage and increases displacement (e.g., the velocity of increases peak displacement by 33.41 mm in comparison to 5 m/s); (2) a 90-year service time leads to >50% severe surface damage and 47.1% residual capacity loss; and (3) the proposed and validated damage formula assessment formula for the residual bearing capacity enables lifecycle maintenance guidance. This work provides a validated framework for assessing combined corrosion-rockfall effects, aiding design and maintenance of structures. |
| format | Article |
| id | doaj-art-fed7ba13f30c47eaabd4c7c913a657f8 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-fed7ba13f30c47eaabd4c7c913a657f82025-08-20T03:36:39ZengMDPI AGBuildings2075-53092025-07-011515259210.3390/buildings15152592Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall ImpactJieqiong Wu0Feiyang Ye1Jian Yang2Jianchao Xu3National Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, ChinaNational Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, ChinaNational Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, ChinaRailway Construction Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100081, ChinaRC piers in mountainous coastal or saline areas face the dual threats of rockfall impacts and chloride-induced steel corrosion, but their combined effects on dynamic response and residual bearing capacity remain unquantified. This study aims to investigate these combined effects over a 90-year service time and propose a damage assessment formula. A validated numerical model (relative error ≤14.7%) of corroded RC columns under impact is developed using ABAQUS, based on which the dynamic response and residual bearing capacity of an actual RC pier subjected to rockfall impacts during the service time of 90 years incorporating corrosion initiation (via Life-365 software 2.2) and propagation are analyzed, with the consideration of various impact energies (1–5 t mass, 5–15 m/s velocity). Results show that (1) increasing impact mass/velocity expands damage and increases displacement (e.g., the velocity of increases peak displacement by 33.41 mm in comparison to 5 m/s); (2) a 90-year service time leads to >50% severe surface damage and 47.1% residual capacity loss; and (3) the proposed and validated damage formula assessment formula for the residual bearing capacity enables lifecycle maintenance guidance. This work provides a validated framework for assessing combined corrosion-rockfall effects, aiding design and maintenance of structures.https://www.mdpi.com/2075-5309/15/15/2592dynamic responseRC piersresidual bearing capacityrockfall impactsteel corrosion |
| spellingShingle | Jieqiong Wu Feiyang Ye Jian Yang Jianchao Xu Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact Buildings dynamic response RC piers residual bearing capacity rockfall impact steel corrosion |
| title | Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact |
| title_full | Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact |
| title_fullStr | Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact |
| title_full_unstemmed | Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact |
| title_short | Dynamic Response and Residual Bearing Capacity of Corroded RC Piers Under Rockfall Impact |
| title_sort | dynamic response and residual bearing capacity of corroded rc piers under rockfall impact |
| topic | dynamic response RC piers residual bearing capacity rockfall impact steel corrosion |
| url | https://www.mdpi.com/2075-5309/15/15/2592 |
| work_keys_str_mv | AT jieqiongwu dynamicresponseandresidualbearingcapacityofcorrodedrcpiersunderrockfallimpact AT feiyangye dynamicresponseandresidualbearingcapacityofcorrodedrcpiersunderrockfallimpact AT jianyang dynamicresponseandresidualbearingcapacityofcorrodedrcpiersunderrockfallimpact AT jianchaoxu dynamicresponseandresidualbearingcapacityofcorrodedrcpiersunderrockfallimpact |