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E. Pinotti¹, L. Zanotti Fragonara¹, S. Jain², V. Lunkar², V. Bhanu², S. Caron³, A. De Marchi³, R. Ceravolo¹ and C. Surace¹

¹Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Italy
²Thapar Institute of Engineering and Technology, Patiala, India
³Department of Electronic and Telecommunications, Politecnico di Torino, Italy

doi:10.4203/ccp.106.97

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E. Pinotti, L. Zanotti Fragonara, S. Jain, V. Lunkar, V. Bhanu, S. Caron, A. De Marchi, R. Ceravolo, C. Surace, "Non-Linear Characterisation of Kevlar and Silicon Carbide Fibres for Structural Health Monitoring Applications", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 97, 2014. doi:10.4203/ccp.106.97

Keywords: structural health monitoring, silicon carbide cables, steel cables, cable stayed bridges, non-destructive non-linearity test..

Summary

Uncertainties about the long term bearing capacity of aramid fibres have made designers reluctant to utilize them for external pre-stressing for cable-stayed bridges. Recent research carried out on cable-stayed bridges has found that the steel cables, although well protected from the external environment, are subject to corrosion, resulting in a risk of structural defects and malfunctions. The question that prompted this study is whether simple and non-destructive non-linearity tests can be used for assessing structural damage in aramid fibres or elements. The concept is to detect weak non-linearities in the dynamic response measured on fibres and ropes and to use the level of non-linearity as an indicator for evaluating the residual life span of aramid elements, cables and ropes. In perspective, a non-linearity test may be easily integrated in structural health monitoring protocols to be employed on aramid cables and elements to collect timely notifications about possible anomalies in the structural behaviour. In order to investigate the sensitivity of such an approach to structural health monitoring, non-linearity characterisation tests were conducted on aramid fibres by applying controlled sweep-sine excitations at different loading levels. In order to have a comparative term and to test the setup machine, a similar characterisation procedure was also applied to a novel material, the silicon carbide, which is known to exhibit a purely brittle behaviour, with no appreciable plastic deformation.

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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: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 97 Non-Linear Characterisation of Kevlar and Silicon Carbide Fibres for Structural Health Monitoring Applications E. Pinotti¹, L. Zanotti Fragonara¹, S. Jain², V. Lunkar², V. Bhanu², S. Caron³, A. De Marchi³, R. Ceravolo¹ and C. Surace¹ ¹Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Italy ²Thapar Institute of Engineering and Technology, Patiala, India ³Department of Electronic and Telecommunications, Politecnico di Torino, Italy doi:10.4203/ccp.106.97 purchase the full-text of this paper Full Bibliographic Reference for this paper E. Pinotti, L. Zanotti Fragonara, S. Jain, V. Lunkar, V. Bhanu, S. Caron, A. De Marchi, R. Ceravolo, C. Surace, "Non-Linear Characterisation of Kevlar and Silicon Carbide Fibres for Structural Health Monitoring Applications", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 97, 2014. doi:10.4203/ccp.106.97 Keywords: structural health monitoring, silicon carbide cables, steel cables, cable stayed bridges, non-destructive non-linearity test.. Summary Uncertainties about the long term bearing capacity of aramid fibres have made designers reluctant to utilize them for external pre-stressing for cable-stayed bridges. Recent research carried out on cable-stayed bridges has found that the steel cables, although well protected from the external environment, are subject to corrosion, resulting in a risk of structural defects and malfunctions. The question that prompted this study is whether simple and non-destructive non-linearity tests can be used for assessing structural damage in aramid fibres or elements. The concept is to detect weak non-linearities in the dynamic response measured on fibres and ropes and to use the level of non-linearity as an indicator for evaluating the residual life span of aramid elements, cables and ropes. In perspective, a non-linearity test may be easily integrated in structural health monitoring protocols to be employed on aramid cables and elements to collect timely notifications about possible anomalies in the structural behaviour. In order to investigate the sensitivity of such an approach to structural health monitoring, non-linearity characterisation tests were conducted on aramid fibres by applying controlled sweep-sine excitations at different loading levels. In order to have a comparative term and to test the setup machine, a similar characterisation procedure was also applied to a novel material, the silicon carbide, which is known to exhibit a purely brittle behaviour, with no appreciable plastic deformation. 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 £65 +P&P)
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