Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China
Bridge expansion joints are critical components that accommodate the movement of a bridge caused by temperature fluctuations, concrete shrinkage, and vehicular loads. Analyzing the spatiotemporal deformation of these expansion joints is essential for monitoring bridge safety. This study investigates...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/1/144 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841548949541879808 |
|---|---|
| author | Baohang Wang Wu Zhu Chaoying Zhao Bojie Yan Xiaojie Liu Guangrong Li Wenhong Li Liye Yang |
| author_facet | Baohang Wang Wu Zhu Chaoying Zhao Bojie Yan Xiaojie Liu Guangrong Li Wenhong Li Liye Yang |
| author_sort | Baohang Wang |
| collection | DOAJ |
| description | Bridge expansion joints are critical components that accommodate the movement of a bridge caused by temperature fluctuations, concrete shrinkage, and vehicular loads. Analyzing the spatiotemporal deformation of these expansion joints is essential for monitoring bridge safety. This study investigates the deformation characteristics of Hongtang Bridge in Fuzhou, China, using synthetic aperture radar interferometry (InSAR). We optimize the network paths to enhance the phase unwrapping process of InSAR. Additionally, to address design matrix bias resulting from inaccurate temperature data, we employ the mixed total least squares method to estimate deformation parameters. Subsequently, we utilize independent component analysis to analyze the spatiotemporal deformation characteristics of the bridge. The average standard deviation of the unwrapped phase and the modeling residuals have been reduced by 87% and 5%, respectively. Our findings indicate that thermal expansion deformation is primarily concentrated in the expansion joints, measuring approximately 0.6 mm/°C. In contrast, the cable-stayed bridge deck exhibits the largest deformation magnitude, exceeding 2.0 mm/°C. This research focuses on bridge structures to identify typical deformation locations and evaluate their deformation characteristics. Such analysis is beneficial for conducting safety assessments of bridges. |
| format | Article |
| id | doaj-art-cdba4eb7a83846b6b6890e466fc3d07b |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-cdba4eb7a83846b6b6890e466fc3d07b2025-01-10T13:21:01ZengMDPI AGSensors1424-82202024-12-0125114410.3390/s25010144Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou ChinaBaohang Wang0Wu Zhu1Chaoying Zhao2Bojie Yan3Xiaojie Liu4Guangrong Li5Wenhong Li6Liye Yang7School of Geography and Oceanography, Minjiang University, Fuzhou 350108, ChinaKey Laboratory of Ecological Geology and Disaster Prevention, Ministry of Natural Resources, Xi’an 710054, ChinaSchool of Geological Engineering and Surveying and Mapping, Chang’an University, Xi’an 710061, ChinaSchool of Geography and Oceanography, Minjiang University, Fuzhou 350108, ChinaSchool of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Geological Engineering and Surveying and Mapping, Chang’an University, Xi’an 710061, ChinaXi’an Center of Geological Survey, China Geological Survey, Xi’an 710054, ChinaCollege of Civil Engineering, Xiangtan University, Xiangtan 411105, ChinaBridge expansion joints are critical components that accommodate the movement of a bridge caused by temperature fluctuations, concrete shrinkage, and vehicular loads. Analyzing the spatiotemporal deformation of these expansion joints is essential for monitoring bridge safety. This study investigates the deformation characteristics of Hongtang Bridge in Fuzhou, China, using synthetic aperture radar interferometry (InSAR). We optimize the network paths to enhance the phase unwrapping process of InSAR. Additionally, to address design matrix bias resulting from inaccurate temperature data, we employ the mixed total least squares method to estimate deformation parameters. Subsequently, we utilize independent component analysis to analyze the spatiotemporal deformation characteristics of the bridge. The average standard deviation of the unwrapped phase and the modeling residuals have been reduced by 87% and 5%, respectively. Our findings indicate that thermal expansion deformation is primarily concentrated in the expansion joints, measuring approximately 0.6 mm/°C. In contrast, the cable-stayed bridge deck exhibits the largest deformation magnitude, exceeding 2.0 mm/°C. This research focuses on bridge structures to identify typical deformation locations and evaluate their deformation characteristics. Such analysis is beneficial for conducting safety assessments of bridges.https://www.mdpi.com/1424-8220/25/1/144InSARbridge expansion jointsHongtang bridgenetwork optimizationmixed total least squaresindependent component analysis |
| spellingShingle | Baohang Wang Wu Zhu Chaoying Zhao Bojie Yan Xiaojie Liu Guangrong Li Wenhong Li Liye Yang Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China Sensors InSAR bridge expansion joints Hongtang bridge network optimization mixed total least squares independent component analysis |
| title | Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China |
| title_full | Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China |
| title_fullStr | Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China |
| title_full_unstemmed | Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China |
| title_short | Hongtang Bridge Expansion Joints InSAR Deformation Monitoring with Advanced Phase Unwrapping and Mixed Total Least Squares in Fuzhou China |
| title_sort | hongtang bridge expansion joints insar deformation monitoring with advanced phase unwrapping and mixed total least squares in fuzhou china |
| topic | InSAR bridge expansion joints Hongtang bridge network optimization mixed total least squares independent component analysis |
| url | https://www.mdpi.com/1424-8220/25/1/144 |
| work_keys_str_mv | AT baohangwang hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT wuzhu hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT chaoyingzhao hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT bojieyan hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT xiaojieliu hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT guangrongli hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT wenhongli hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina AT liyeyang hongtangbridgeexpansionjointsinsardeformationmonitoringwithadvancedphaseunwrappingandmixedtotalleastsquaresinfuzhouchina |