Study on the dynamic properties of a suspended bridge using monocular digital photography to monitor the bridge dynamic deformation

With the acceleration of urbanization, there are increasingly more high-rise buildings in cities. In turn, high-rise building collapse accidents occur frequently. The causes of the danger, in addition to the extremely severe stress, are predominantly due to the long-term role of unstable factors, resulting in an unrecoverable internal structure. Therefore, it is advisable to monitor the dynamic deformation of buildings to prevent accidents. However, there is no particularly mature application system on the market to enable this monitoring, so our research group has carried out a long-term research in this field. This paper introduces the design of a set of practical information systems by using information technology and the principle of close-range photogrammetry. The system used the photographing scale transformation-time baseline parallax (PST-TBP) method to analyse image data collected with a digital camera, implement close-range photogrammetry, and input the image data into a computer. A building deformation diagram is obtained using our own software. The associated deformation curve can clearly reproduce the building deformation trend to monitor the building health. We conducted many laboratory simulation experiments to verify the information system, and the verification results prove that this process is rigorous. To apply this information system to a real-life scenario as soon as possible, we further studied its application to high-rise buildings, improved the system by using data and experience obtained by monitoring the tallest local building, and achieved good results. Finally, combined with the development of current intelligent technology, directions for system improvement are explored.

show abstract

“…Points labeled as C0-C9 are reference points, which formed the reference plane. e test process and impact loads are detailed in [28].…”

Section: Accuracy Assessment Of Ddmis In the Laboratorymentioning

confidence: 99%

Research on the Application of an Information System in Monitoring the Dynamic Deformation of a High-Rise Building

Chen

Zhang

et al. 2020

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Assuming that the digital camera and the object do not move during testing, research shows that the distortion errors are linear near the centers of the resulting images. Thus, we adopt a grid method in the study to eliminate the distortion of the digital camera [15]. After correcting the distortion, we used the direct linear transformation (DLT) method [16,17] to assess the measurement accuracy of the digital camera:…”

Section: Accuracy Assessment Of the Digital Cameramentioning

confidence: 99%

Monitoring Dynamic Deformation of Shuttle Steel Shelves by Digital Photography

Yu¹,

Zhang²,

Ding³

et al. 2019

CEJ

Self Cite

View full text Add to dashboard Cite

Shuttle steel shelves (steel shelves equipped with shuttles) are popular in modern logistics. The safety of shuttle steel shelves is an issue due to the complicated dynamic load that develops when the shuttles are in operation. As deformation is an important index of structural safety, this study uses a DPS (digital photography system) based on the PST-IM-MP (photograph scale transformation-image matching-motion parallax) method to monitor shuttle steel shelves: a digital camera (SONY350) was used to monitor the dynamic deformation of shuttle steel shelves when the shuttles began to move, accelerated, moved at constant speed, decelerated and stopped. Then, the deformation trends of the shuttle steel shelves were depicted to study the moving trajectory in a local area. Moreover, we analysed the stresses in the shuttle steel shelves based on these monitoring data. The results showed that the PST-IM-MP method can meet the accuracy requirements in monitoring the dynamic deformation of steel shelves as the maximum and minimum measurement errors were 0.74 pixels and 0.34 pixels in the comprehensive direction, respectively. The shuttle steel shelves were robust because the deformations were elastic and within the allowed10mm. Shear and tension stresses developed in the shuttle steel shelves when the shuttles were in operation. Thus, in the future DPS will become popular for monitoring shuttle steel shelves in real time to warn of possible dangers and mitigate hazards. Additionally, the monitoring data can be used to study the stability of the shuttle steel shelves to improve the related stability design theory.

show abstract

“…After correcting the digital camera distortion, we used the direct linear transformation method (Zhang et al, 2018a) to assess the measurement accuracy of the digital camera. The direct linear transformation method was used to calculate the spatial coordinates of deformation point U0 and U1 based on the coordinates in Tables 1 and 2.…”

Section: Distortion Correction Of Digital Cameramentioning

confidence: 99%

Monitoring Sluice Health in Vibration by Monocular Digital Photography and a Measurement Robot

Zhang

Guo

et al. 2019

KSCE J Civ Eng

Self Cite

View full text Add to dashboard Cite

General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Study on the dynamic properties of a suspended bridge using monocular digital photography to monitor the bridge dynamic deformation

Abstract: Study on the dynamic properties of a suspended bridge using monocular digital photography to monitor the bridge dynamic deformation.

Cited by 19 publications

References 24 publications

Research on the Application of an Information System in Monitoring the Dynamic Deformation of a High-Rise Building

Research on the Application of an Information System in Monitoring the Dynamic Deformation of a High-Rise Building

Monitoring Dynamic Deformation of Shuttle Steel Shelves by Digital Photography

Monitoring Sluice Health in Vibration by Monocular Digital Photography and a Measurement Robot

Contact Info

Product

Resources

About