Analyzing crack development pattern of masonry structure in seismic oscillation by digital photography

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Guojian^1 ; Yu, Chengxin^2 ; Ding, Xinhua^3

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

221116, China^1

Business School, Shandong Jianzhu University, Jinan

25010, China^2

Map Institute of Shandong Province, Jinan, Shandong

250001, China^3

关键词: Average errors;    Crack development;    Deformation monitoring;    Digital photography;    Intrinsic and extrinsic parameters;    Masonry structures;    Measurement accuracy;    Parallax methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032062/pdf
DOI  :  10.1088/1755-1315/108/3/032062

来源: IOP

【 摘 要 】

In this study, digital photography is used to monitor the instantaneous deformation of a masonry wall in seismic oscillation. In order to obtain higher measurement accuracy, the image matching-time baseline parallax method (IM-TBPM) is used to correct errors caused by the change of intrinsic and extrinsic parameters of digital cameras. Results show that the average errors of control point C5 are 0.79mm, 0.44mm and 0.96mm in X, Z and comprehensive direction, respectively. The average errors of control point C6 are 0.49mm, 0.44mm and 0.71mm in X, Z and comprehensive direction, respectively. These suggest that IM-TBPM can meet the accuracy requirements of instantaneous deformation monitoring. In seismic oscillation the middle to lower of the masonry wall develops cracks firstly. Then the shear failure occurs on the middle of masonry wall. This study provides technical basis for analyzing the crack development pattern of masonry structure in seismic oscillation and have significant implications for improved construction of masonry structures in earthquake prone areas.