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Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges

Despite the recent developments in structural health monitoring, there remain great challenges for accurately, conveniently, and economically assessing the in-service performance of the main cables for long-span suspension bridges. A long-term structural health monitoring technique is developed to m...

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Detalles Bibliográficos
Autores principales: Deng, Yang, Liu, Yang, Chen, Suren
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5492407/
https://www.ncbi.nlm.nih.gov/pubmed/28621743
http://dx.doi.org/10.3390/s17061414
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author Deng, Yang
Liu, Yang
Chen, Suren
author_facet Deng, Yang
Liu, Yang
Chen, Suren
author_sort Deng, Yang
collection PubMed
description Despite the recent developments in structural health monitoring, there remain great challenges for accurately, conveniently, and economically assessing the in-service performance of the main cables for long-span suspension bridges. A long-term structural health monitoring technique is developed to measure the tension force with a conventional sensing technology and further provide the in-service performance assessment strategy of the main cable. The monitoring system adopts conventional vibrating strings transducers to monitor the tension forces of separate cable strands of the main cable in the anchor span. The performance evaluation of the main cable is conducted based on the collected health monitoring data: (1) the measured strand forces are used to derive the overall tension force of a main cable, which is further translated into load bearing capacity assessment using the concept of safety factor; and (2) the proposed technique can also evaluate the uniformity of tension forces from different cable strands. The assessment of uniformity of strand forces of a main cable offers critical information in terms of potential risks of partial damage and performance deterioration of the main cable. The results suggest the proposed low-cost monitoring system is an option to provide approximate estimation of tension forces of main cables for suspension bridges. With the long-term monitoring data, the proposed monitoring-based evaluation methods can further provide critical information to assess the safety and serviceability performance of main cables.
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spelling pubmed-54924072017-07-03 Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges Deng, Yang Liu, Yang Chen, Suren Sensors (Basel) Article Despite the recent developments in structural health monitoring, there remain great challenges for accurately, conveniently, and economically assessing the in-service performance of the main cables for long-span suspension bridges. A long-term structural health monitoring technique is developed to measure the tension force with a conventional sensing technology and further provide the in-service performance assessment strategy of the main cable. The monitoring system adopts conventional vibrating strings transducers to monitor the tension forces of separate cable strands of the main cable in the anchor span. The performance evaluation of the main cable is conducted based on the collected health monitoring data: (1) the measured strand forces are used to derive the overall tension force of a main cable, which is further translated into load bearing capacity assessment using the concept of safety factor; and (2) the proposed technique can also evaluate the uniformity of tension forces from different cable strands. The assessment of uniformity of strand forces of a main cable offers critical information in terms of potential risks of partial damage and performance deterioration of the main cable. The results suggest the proposed low-cost monitoring system is an option to provide approximate estimation of tension forces of main cables for suspension bridges. With the long-term monitoring data, the proposed monitoring-based evaluation methods can further provide critical information to assess the safety and serviceability performance of main cables. MDPI 2017-06-16 /pmc/articles/PMC5492407/ /pubmed/28621743 http://dx.doi.org/10.3390/s17061414 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Deng, Yang
Liu, Yang
Chen, Suren
Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title_full Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title_fullStr Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title_full_unstemmed Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title_short Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges
title_sort long-term in-service monitoring and performance assessment of the main cables of long-span suspension bridges
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5492407/
https://www.ncbi.nlm.nih.gov/pubmed/28621743
http://dx.doi.org/10.3390/s17061414
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