Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach
Numerical modeling approaches are favored for performing long-term analyses of continuous prestressed concrete rigid-frame (CPCR) bridges due to the complexity and high cost of experimental testing on such structures. In this study, a refined numerical modeling approach is first presented and valida...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/17/9727 |
| _version_ | 1797582800381018112 |
|---|---|
| author | Xu Han Wanheng Li Pengfei Li |
| author_facet | Xu Han Wanheng Li Pengfei Li |
| author_sort | Xu Han |
| collection | DOAJ |
| description | Numerical modeling approaches are favored for performing long-term analyses of continuous prestressed concrete rigid-frame (CPCR) bridges due to the complexity and high cost of experimental testing on such structures. In this study, a refined numerical modeling approach is first presented and validated by comparing the field monitor data of an existing long-span CPCR bridge in China. Then, long-term deflection analysis—considering box girder cracks, concrete creep, joint damage behavior and prestress—is conducted based on the proposed refined modeling approach. It is found that the time-dependent loss of longitudinal prestress has the most significant influence on the long-term structural stiffness, while joint damage between different segments has limited impact on overall structural performance, especially for large-span bridge cases. The local stress distribution is significantly influenced by typical damage, albeit with a different scope of impact. Therefore, targeted reinforcement has to be performed to achieve satisfactory repair results under different damage conditions. |
| first_indexed | 2024-03-10T23:27:40Z |
| format | Article |
| id | doaj.art-65a23485f5894903a151f9b1789848b2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T23:27:40Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-65a23485f5894903a151f9b1789848b22023-11-19T07:51:00ZengMDPI AGApplied Sciences2076-34172023-08-011317972710.3390/app13179727Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling ApproachXu Han0Wanheng Li1Pengfei Li2Research Institute of Highway Ministry of Transport, Beijing 100088, ChinaResearch Institute of Highway Ministry of Transport, Beijing 100088, ChinaResearch Institute of Highway Ministry of Transport, Beijing 100088, ChinaNumerical modeling approaches are favored for performing long-term analyses of continuous prestressed concrete rigid-frame (CPCR) bridges due to the complexity and high cost of experimental testing on such structures. In this study, a refined numerical modeling approach is first presented and validated by comparing the field monitor data of an existing long-span CPCR bridge in China. Then, long-term deflection analysis—considering box girder cracks, concrete creep, joint damage behavior and prestress—is conducted based on the proposed refined modeling approach. It is found that the time-dependent loss of longitudinal prestress has the most significant influence on the long-term structural stiffness, while joint damage between different segments has limited impact on overall structural performance, especially for large-span bridge cases. The local stress distribution is significantly influenced by typical damage, albeit with a different scope of impact. Therefore, targeted reinforcement has to be performed to achieve satisfactory repair results under different damage conditions.https://www.mdpi.com/2076-3417/13/17/9727prestressed concrete rigid-frame bridgesrefined modeling approachperformance degradationlong-term deflectioncause analysis |
| spellingShingle | Xu Han Wanheng Li Pengfei Li Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach Applied Sciences prestressed concrete rigid-frame bridges refined modeling approach performance degradation long-term deflection cause analysis |
| title | Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach |
| title_full | Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach |
| title_fullStr | Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach |
| title_full_unstemmed | Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach |
| title_short | Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach |
| title_sort | long term deflection analysis of large span continuous prestressed concrete rigid frame bridges based on a refined modeling approach |
| topic | prestressed concrete rigid-frame bridges refined modeling approach performance degradation long-term deflection cause analysis |
| url | https://www.mdpi.com/2076-3417/13/17/9727 |
| work_keys_str_mv | AT xuhan longtermdeflectionanalysisoflargespancontinuousprestressedconcreterigidframebridgesbasedonarefinedmodelingapproach AT wanhengli longtermdeflectionanalysisoflargespancontinuousprestressedconcreterigidframebridgesbasedonarefinedmodelingapproach AT pengfeili longtermdeflectionanalysisoflargespancontinuousprestressedconcreterigidframebridgesbasedonarefinedmodelingapproach |