Exploring of PST-TBPM in Monitoring Dynamic Deformation of Steel Structure in Vibration

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Chen, Mingzhi^1 ; Zhao, Yongqian^2 ; Hai, Hua^3 ; Yu, Chengxin^1 ; Zhang, Guojian^4

Business School, Shandong Jianzhu University, Jinan

250101, China^1

School of Science, Shandong Jianzhu University, Jinan

250101, China^2

Teacher Training Center of Shandong High School, Shandong Normal University, Jinan

250014, China^3

School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou

221116, China^4

关键词: Deformation curves;    Deformation point;    Digital photography;    Displacement value;    Dynamic deformation;    Relative deformation;    Scale transformation;    Structure deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022047/pdf
DOI  :  10.1088/1755-1315/108/2/022047

来源: IOP

【 摘 要 】

In order to monitor the dynamic deformation of steel structure in the real-time, digital photography is used in this paper. Firstly, the grid method is used correct the distortion of digital camera. Then the digital cameras are used to capture the initial and experimental images of steel structure to obtain its relative deformation. PST-TBPM (photographing scale transformation-time baseline parallax method) is used to eliminate the parallax error and convert the pixel change value of deformation points into the actual displacement value. In order to visualize the deformation trend of steel structure, the deformation curves are drawn based on the deformation value of deformation points. Results show that the average absolute accuracy and relative accuracy of PST-TBPM are 0.28mm and 1.1‰, respectively. Digital photography used in this study can meet accuracy requirements of steel structure deformation monitoring. It also can warn the safety of steel structure and provide data support for managers' safety decisions based on the deformation curves on site.