Bibliographic Details
| Title: |
Monitoring and Analysis of Prestress Loss in Prestressed Box Girder Bridges Strengthened with External Prestressing |
| Authors: |
Haoran Guo, Jing Yang, Renjie Tang, Caiqian Yang, Fu Xu |
| Source: |
Sensors, Vol 24, Iss 14, p 4549 (2024) |
| Publisher Information: |
MDPI AG, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Chemical technology |
| Subject Terms: |
prestress loss, external prestressing, monitoring, magnetic flux rope force transducers, Fiber Bragg Grating sensors, Chemical technology, TP1-1185 |
| More Details: |
To investigate the effects of long-term prestress loss on concrete box girders strengthened with external prestressing, a large-span box girder, in service for over 20 years and strengthened with external prestressing, was monitored for four months. Prestress loss in the longitudinal, vertical, and transverse directions of the box girder was calculated according to Chinese code requirements. Magnetic flux rope force transducers were used to monitor the prestress loss in the external prestressing cables. Fiber Bragg Grating (FBG) sensors were used to monitor deflection changes at the mid-span of the bridge. Finally, the effect of prestress loss in the longitudinal, vertical, and transverse tendons on mid-span deflection was investigated through simulations using ABAQUS software. The results show that instantaneous prestress loss accounts for most of the total loss compared to long-term loss, and that longitudinal prestress loss has the most significant effect on mid-span deflection. The impact of longitudinal prestress loss on deflection before and after strengthening was also compared. The downward deflection and up-ward arch caused by longitudinal tendon prestress loss were reduced after strengthening, con-firming the effectiveness of the external prestressing method. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1424-8220 |
| Relation: |
https://www.mdpi.com/1424-8220/24/14/4549; https://doaj.org/toc/1424-8220 |
| DOI: |
10.3390/s24144549 |
| Access URL: |
https://doaj.org/article/56309bfbe73f45e0805047de06a77492 |
| Accession Number: |
edsdoj.56309bfbe73f45e0805047de06a77492 |
| Database: |
Directory of Open Access Journals |
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