Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (4): 127-137.doi: 10.6040/j.issn.1672-3961.0.2024.315

• Civil Engineering • Previous Articles    

Dynamic deformation law monitoring of extra-long span bridges based on GB-RAR technology

ZHANG Guojian1, FU Lianlong1, ZHANG Qingsong2*, SANG Wengang1, LI Jianqiang3, ZHOU Lu3, FU Tao4, LIU Shengzhen5   

  1. ZHANG Guojian1, FU Lianlong1, ZHANG Qingsong2*, SANG Wengang1, LI Jianqiang3, ZHOU Lu3, FU Tao4, LIU Shengzhen5(1. School of Surveying and Geo-Informatics, Shandong Jianzhu University, Jinan 250101, Shandong, China;
    2. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;
    3. Shandong Hi-Speed Road and Bridge Group Co., Ltd., Jinan 250013, Shandong, China;
    4. School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China;
    5. First Geodetic Survey Team, Ministry of Natural Resources, Xi'an 710054, Shaanxi, China
  • Published:2025-08-31

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Abstract: As bridge spans increase, bridge flexibility is enhanced, making dynamic deflection deformation a critical indicator for assessing bridge health. Traditional monitoring methods, including sensors, measurement robots, and GPS, are limited in their ability to provide non-contact, high-frequency, and comprehensive dynamic deformation monitoring for large-span bridges. This research aimed to monitor the overall deformation patterns of the Yellow River Phoenix Bridge under dynamic vehicle loads using ground-based real aperture radar(GB-RAR)technology, with data quality enhanced through wavelet function analysis. The research results indicated that after wavelet denoising, the measurement error of GB-RAR was reduced to 0.016 5 mm, meeting the required accuracy for deformation monitoring. Under dynamic vehicle loads, bridge deformation followed the wave-sin-sqr model, with a maximum mid-span deflection deformation of 131.61 mm, which was within the tolerance specified by the General Codes for Highway Bridges and Culverts. These findings offered technological and data support for safety monitoring and reinforcement design of ultra-large-span bridges, such as the Yellow River Phoenix Bridge.

Key words: ground-based radar, dynamic load, deformation monitoring, ultra-large-span bridge

CLC Number: 

  • P237
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