|Table of Contents|

Application of Stereo Vision on Static Test of Reinforced Concrete Beams Strengthened with UV-GFRP(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年03期
Page:
97-103
Research Field:
Publishing date:

Info

Title:
Application of Stereo Vision on Static Test of Reinforced Concrete Beams Strengthened with UV-GFRP
Author(s):
SHAN Bao-hua;  SHEN Yu;  XIAN Gui-jun
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
Keywords:
stereo vision;  three-dimensional;  measurement;  UV-GFRP;  reinforced concrete beam
PACS:
TU317
DOI:
-
Abstract:
To meet the measurement requirement of three-dimensional deformation of structure static test, the three-dimensional mathematical model of stereo vision measurement method was founded, and the out-of-plane and in-plane displacement equations of structure deformation were obtained. The algorithms of edge detection, character recognition and center fitting were studied for circle identifying points, and the epipolar constraint criteria were used to match and track the identifying point precisely. The structure deformation analysis software of stereo vision which could run independently was compiled on the base of above imaging processing algorithms with MATLAB. The destructive tests of reinforced concrete beams strengthened with UV-GFRP were performed with the stereo vision measurement system integrated, which were put in the indoor environment and alkaline solution for six months separately. The test results were compared with the data of universal testing machine. Results show that the load-displacement curves are consistent in trend and in good agreement between two methods. It is verified that the stereo vision method is feasible for measuring the three-dimensional deformation of structure static test.

References:

[1] 李 杉.环境与荷载共同作用下FRP加固混凝土耐久性[D].大连:大连理工大学,2009. LI Shan.Durability of Concrete Strengthened with FRP Under Environmental and Loading Conditions[D].Dalian:Dalian University of Technology,2009.
[2]LI X D,XIE H M,KANG Y L,et al.A Brief Review and Prospect of Experimental Solid Mechanics in China[J].Acta Mechanica Solida Sinica,2010,23(6):498-548.
[3]马颂德,张正友.计算机视觉[M].北京:科学出版社,1998. MA Song-de,ZHANG Zheng-you.Computer Vision[M].Beijing:Science Press,1998.
[4]AW Y B,KOO T K.Phototriangulation Using CCD Camera in Close-range Environment[J].Journal of Surveying Engineering,1993,119(2):52-58.
[5]RASCHKE S A.Computer Vision for Experimental Soil Micromechanics and Soil Characterization[D].Ann Arbor:University of Michigan,1996.
[6]JANSEN D C.Postpeak Properties of High Strength Concrete Cylinders in Compression and Reinforced Beams in Shear[D].Evanston:Northwestern University,1996.
[7]ANDRESEN K.Strain Tensor for Large Three-dimensional Surface Deformation of Sheet Metal from an Object Grating[J].Experimental Mechanics,1999,39(1):30-35.
[8]吴福朝.计算机视觉中的数学方法[M].北京:科学出版社,2008:46-47. WU Fu-chao.Mathematical Method in Computer Vision[M].Beijing:Science Press,2008:46-47.
[9]张广军.视觉测量[M].北京:科学出版社,2008. ZHANG Guan-jun.Vision Measurement[M].Beijing:Science Press,2008.
[10]ZHANG Z Y.A Flexible New Technique for Camera Calibration[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2000,22(11):1330-1334.
[11]周富强.双目立体视觉检测的关键技术研究[D].北京:北京航空航天大学,2002. ZHOU Fu-qiang.Research on Key Technologies of Binocular Stereo Vision Inspection[D].Beijing:Beihang University,2002.
[12]CANNY J.A Computational Approach to Edge Detection[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,1986,8(6):679-698.
[13]QU Y D,CUI C S,CHEN S B,et al.A Fast Subpixel Edge Detection Method Using Sobel-Zernike Moments Operator[J].Image and Vision Computing,2005,23(1):11-17.
[14]XIAO Z Z,LIANG J,YU D H,et al.Rapid Three-dimension Optical Deformation Measurement for Transmission Tower with Different Loads [J].Optics and Lasers in Engineering,2010,48(9):869-876.

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Last Update: 2012-09-20