Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts
This study proposes a time-dependent reliability analysis method for aqueduct structures based on concrete carbonation and finite element analysis. The primary goal of this study is to improve the reliability assessment of reinforced concrete aqueducts by incorporating environmental factors such as...
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| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/1/463 |
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| author | Lan Zhang Ri-Sheng He Long-Wen Zhang Yan-Ye Chen |
| author_facet | Lan Zhang Ri-Sheng He Long-Wen Zhang Yan-Ye Chen |
| author_sort | Lan Zhang |
| collection | DOAJ |
| description | This study proposes a time-dependent reliability analysis method for aqueduct structures based on concrete carbonation and finite element analysis. The primary goal of this study is to improve the reliability assessment of reinforced concrete aqueducts by incorporating environmental factors such as carbonation over time. First, a three-dimensional finite element model of a reinforced concrete aqueduct is established using the Midas 2022 Civil software, incorporating a time-varying function derived from a predictive model of concrete carbonation depth. Point estimation is then integrated with structural finite element analysis to calculate the first four moments of random variables as functions of concrete carbonation. Additionally, the original performance function is transformed into a normal distribution using dual power transformation and the Jarque–Bera test. The high-order unscented transformation (HUT) is subsequently employed to estimate the first four moments of the transformed performance function, facilitating the calculation of time-varying reliability indices for the carbonated concrete aqueduct. Based on the time-varying reliability index data, a reliability function corresponding to different time points is fitted and applied to service life prediction. The results demonstrate that the proposed method effectively reduces large errors associated with the fourth-moment method in calculating large reliability indices. Furthermore, the comparison with Monte Carlo simulation (MCS) results validates the high efficiency and accuracy of the proposed method, offering a valuable tool for addressing the reliability challenges of aqueducts exposed to carbonation and other environmental factors over time. |
| format | Article |
| id | doaj-art-9ba0adadca57417ab46f8bffd2cb4d98 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-9ba0adadca57417ab46f8bffd2cb4d982025-01-10T13:15:38ZengMDPI AGApplied Sciences2076-34172025-01-0115146310.3390/app15010463Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete AqueductsLan Zhang0Ri-Sheng He1Long-Wen Zhang2Yan-Ye Chen3College of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha 410128, ChinaCollege of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha 410128, ChinaCollege of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha 410128, ChinaCollege of Water Resources & Civil Engineering, Hunan Agricultural University, Changsha 410128, ChinaThis study proposes a time-dependent reliability analysis method for aqueduct structures based on concrete carbonation and finite element analysis. The primary goal of this study is to improve the reliability assessment of reinforced concrete aqueducts by incorporating environmental factors such as carbonation over time. First, a three-dimensional finite element model of a reinforced concrete aqueduct is established using the Midas 2022 Civil software, incorporating a time-varying function derived from a predictive model of concrete carbonation depth. Point estimation is then integrated with structural finite element analysis to calculate the first four moments of random variables as functions of concrete carbonation. Additionally, the original performance function is transformed into a normal distribution using dual power transformation and the Jarque–Bera test. The high-order unscented transformation (HUT) is subsequently employed to estimate the first four moments of the transformed performance function, facilitating the calculation of time-varying reliability indices for the carbonated concrete aqueduct. Based on the time-varying reliability index data, a reliability function corresponding to different time points is fitted and applied to service life prediction. The results demonstrate that the proposed method effectively reduces large errors associated with the fourth-moment method in calculating large reliability indices. Furthermore, the comparison with Monte Carlo simulation (MCS) results validates the high efficiency and accuracy of the proposed method, offering a valuable tool for addressing the reliability challenges of aqueducts exposed to carbonation and other environmental factors over time.https://www.mdpi.com/2076-3417/15/1/463finite element methodaqueductdual power transformationHUTtime-dependent reliability |
| spellingShingle | Lan Zhang Ri-Sheng He Long-Wen Zhang Yan-Ye Chen Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts Applied Sciences finite element method aqueduct dual power transformation HUT time-dependent reliability |
| title | Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts |
| title_full | Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts |
| title_fullStr | Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts |
| title_full_unstemmed | Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts |
| title_short | Finite-Element-Based Time-Dependent Service Life Prediction for Carbonated Reinforced Concrete Aqueducts |
| title_sort | finite element based time dependent service life prediction for carbonated reinforced concrete aqueducts |
| topic | finite element method aqueduct dual power transformation HUT time-dependent reliability |
| url | https://www.mdpi.com/2076-3417/15/1/463 |
| work_keys_str_mv | AT lanzhang finiteelementbasedtimedependentservicelifepredictionforcarbonatedreinforcedconcreteaqueducts AT rishenghe finiteelementbasedtimedependentservicelifepredictionforcarbonatedreinforcedconcreteaqueducts AT longwenzhang finiteelementbasedtimedependentservicelifepredictionforcarbonatedreinforcedconcreteaqueducts AT yanyechen finiteelementbasedtimedependentservicelifepredictionforcarbonatedreinforcedconcreteaqueducts |