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A. Mohamed^1,3, H. Zhang¹, I. Smith¹ and Z. Xiao³

¹School of Engineering and the Built Environment, Edinburgh Napier University, United Kingdom
²Faculty of Architecture and Civil Engineering, Henan University of Technology, Zhengzhou, China
³Department of Civil Engineering, University of Omar Al-Mukhtar, El-Beida, Libya

doi:10.4203/ccp.108.260

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A. Mohamed, H. Zhang, I. Smith, Z. Xiao, "A Low Cost Non-Contact and Non-Destructive Method for Evaluating the Variation of the Shear Modulus for Glued Laminated Timber Beams using a Photogrammetric Approach", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 260, 2015. doi:10.4203/ccp.108.260

Keywords: torsion test, inclinometers, photogrammetric approach, stereovision, timber.

Summary

This paper presents the experimental studies performed to investigate the feasibility of the proposed photogrammetric system for torsion tests. In this study, two binocular stereo systems were used to measure the surface rotation of timber glulam beams under torsional loading. The first stereo system was employed to monitor the photogrammetric pattern painted on the left sides of the timber samples whereas the second system was employed to monitor the pattern painted on the right sides of the timber samples. This test result has revealed how to provide more details on the surface deformation of timber samples as this may assist in understanding their torsional behaviour during loading. Several test series were conducted with twelve timber samples under torsional loading. The proposed approach was validated by comparing its angular measurements with those measured by inclinometers placed above the photogrammetric patterns. The results showed that the optical systems not only allowed assessing performance and reliability of inclinometers but also allowed monitoring the shear modulus of the samples at various locations by providing more information which would not be possible to obtain using the traditional techniques.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 108 PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping Paper 260 A Low Cost Non-Contact and Non-Destructive Method for Evaluating the Variation of the Shear Modulus for Glued Laminated Timber Beams using a Photogrammetric Approach A. Mohamed^1,3, H. Zhang¹, I. Smith¹ and Z. Xiao³ ¹School of Engineering and the Built Environment, Edinburgh Napier University, United Kingdom ²Faculty of Architecture and Civil Engineering, Henan University of Technology, Zhengzhou, China ³Department of Civil Engineering, University of Omar Al-Mukhtar, El-Beida, Libya doi:10.4203/ccp.108.260 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Mohamed, H. Zhang, I. Smith, Z. Xiao, "A Low Cost Non-Contact and Non-Destructive Method for Evaluating the Variation of the Shear Modulus for Glued Laminated Timber Beams using a Photogrammetric Approach", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 260, 2015. doi:10.4203/ccp.108.260 Keywords: torsion test, inclinometers, photogrammetric approach, stereovision, timber. Summary This paper presents the experimental studies performed to investigate the feasibility of the proposed photogrammetric system for torsion tests. In this study, two binocular stereo systems were used to measure the surface rotation of timber glulam beams under torsional loading. The first stereo system was employed to monitor the photogrammetric pattern painted on the left sides of the timber samples whereas the second system was employed to monitor the pattern painted on the right sides of the timber samples. This test result has revealed how to provide more details on the surface deformation of timber samples as this may assist in understanding their torsional behaviour during loading. Several test series were conducted with twelve timber samples under torsional loading. The proposed approach was validated by comparing its angular measurements with those measured by inclinometers placed above the photogrammetric patterns. The results showed that the optical systems not only allowed assessing performance and reliability of inclinometers but also allowed monitoring the shear modulus of the samples at various locations by providing more information which would not be possible to obtain using the traditional techniques. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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