'Smart repair' strategies using advanced metrology for enhanced structural health monitoring

使用先进计量技术增强结构健康监测的“智能修复”策略

• 批准号: EP/H018247/1
• 负责人: Kenneth Grattan
• 金额: $ 40.87万
• 依托单位: City, University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH018247%2F1
• 关键词: Smart; repair; strategies; using; advanced

Much of our current infrastructure, built of modern materials such as concrete, has or will require extensive repair, in service - often after even a relatively short period of its design life or to extend that life and reduce the costs on 'new build'. Currently an estimated ~600M is spent annually on the repair and maintenance of concrete infrastructure in the UK alone, a figure that is multiplied many times across the developed nations. Serviceability and enhanced whole life performance are critical to effective use and the long-term monitoring of such structures is invaluable to ensure full structural capability, to minimize risk to the public and give value for money. Further, there is a clear future for concrete infrastructure: the advancement of lightweight materials with a long service life is seen as essential to sustainable development, for example using highly durable lightweight, low energy concrete which can be used in a novel and pre-cast products and incorporating within it advanced monitoring systems. However, critical to achieving the maximum value from our infrastructure is a fuller understanding of the needs and challenges of allowing for better assessment of existing structures during their service lifetime as well as the creation of better structures for the future, using new materials. In both cases effective monitoring systems, installed or retrofitted and used to give reliable and informative data, having the confidence of the user community and industry, need to be developed and used widely. Thus monitoring and evaluation of the efficacy of repair strategies, as a key aspect of structural health monitoring, is the target of this proposal. This is made possible, uniquely in this project, by two factors coming together - the availability of a bridge where the damage conditions that have been applied since the bridge was moved to its present site will be well known and closely documented (as part of work done by NPL), as are the repair strategies that have been and will be applied to it. Addressing this in this project is the use of new, calibrated monitoring devices applied both during the repair procedure itself and subsequently, in both cases to allow the effects of the repair on the bridge to be monitored quantitatively and the work is thus very complementary to and adds value to research currently at NPL. Conventional SHM provides an assessment which allows the owners of large engineering assets to schedule maintenance more accurately, and can give an early warning of possible structural failure. The sort of system proposed in this project will provide early warning of potential problems and help in the better planning of maintenance and repair: the proposal herein will allow the repair strategies to be determined, monitored and evaluated. The overall aim is thus for better information to predict the likely potential for failure, the need for repair, the efficacy of the repair and thus the likely lifetime of a structure such as a bridge. This recognizes the wide industrial need for predictive systems that can monitor structures and inform the asset holder on its state of health, both in terms of its physical structure and chemical changes, where the type of structure could include bridges, buildings, power plant, aircraft, chemical plant etc. Even just considering the situation with bridges, a simple clear indication of the structure's health will provide substantial economic benefits since there are over 10,000 bridges worth more than 1M each in the UK alone - offering effective repair and thus cheaper maintenance and lower running costs would thus be of significant benefit.

我们目前的许多基础设施都是由混凝土等现代材料建造的，在使用中已经或将需要进行大规模维修-通常在设计寿命相对较短的时间内，或者延长寿命并降低“新建”成本。目前，仅在英国，每年估计就有约6亿美元用于混凝土基础设施的维修和维护，这一数字在发达国家翻了好几倍。可服务性和增强的全寿命性能对于有效使用至关重要，对此类结构的长期监测对于确保充分的结构能力，最大限度地减少对公众的风险并实现物有所值至关重要。此外，混凝土基础设施的未来是明确的：使用寿命长的轻质材料的进步被视为可持续发展的关键，例如使用高度耐用的轻质低能耗混凝土，可用于新型预制产品，并在其中纳入先进的监测系统。然而，从我们的基础设施中实现最大价值的关键是更充分地了解在使用寿命期间更好地评估现有结构以及使用新材料为未来创建更好结构的需求和挑战。在这两种情况下，都需要开发和广泛使用有效的监测系统，安装或改装这些系统，以便提供可靠和有用的数据，并得到用户群体和工业界的信任。因此，作为结构健康监测的一个重要方面，监测和评估的维修策略的有效性，是本建议的目标。在本项目中，这一点是独一无二的，因为两个因素结合在一起--桥梁的可用性，自桥梁移至现址以来所应用的损坏条件将是众所周知的，并有密切的记录（作为NPL所做工作的一部分），以及已经和将要应用于它的修复策略。在这个项目中解决这个问题是使用新的，在修复过程中和修复后，都使用了校准的监测设备，以便对修复对桥梁的影响进行定量监测，因此，这项工作对NPL目前的研究具有很大的补充作用，并增加了价值。传统的SHM提供了一种评估，允许大型工程资产的所有者更准确地安排维护，并可以对可能的结构故障发出早期警告。本项目中提出的系统将提供潜在问题的早期预警，并有助于更好地规划维护和维修：本项目中的建议将允许确定、监测和评估维修策略。因此，总体目标是获得更好的信息，以预测可能发生故障的可能性、维修的必要性、维修的有效性，从而预测桥梁等结构的可能寿命。这就认识到了对预测系统的广泛工业需求，该预测系统可以监测结构并通知资产保持器持有者其健康状态，包括其物理结构和化学变化，其中结构类型可以包括桥梁、建筑物、发电厂、飞机、化工厂等。结构健康的简单清楚的指示将提供实质性的经济效益，因为有超过10个，仅在英国，就有价值超过100万美元的000座桥梁-提供有效的维修，从而降低维护成本和运营成本，这将带来巨大的好处。

项目成果

[INVITED] Developments in optical fibre sensors for industrial applications

• DOI: 10.1016/j.optlastec.2015.09.004
• 发表时间: 2016-04-01
• 期刊: OPTICS AND LASER TECHNOLOGY
• 影响因子: 5
• 作者: Alwis, L.;Sun, T.;Grattan, K. T. V.
• 通讯作者: Grattan, K. T. V.

Fibre Bragg Grating-Based Acoustic Sensor Array for Improved Condition Monitoring of Marine Lifting Surfaces

• DOI: 10.1109/jlt.2016.2601122
• 发表时间: 2016-09
• 期刊: Journal of Lightwave Technology
• 影响因子: 4.7
• 作者: M. Vidakovic;I. Armakolas;T. Sun;J. Carlton;K. Grattan

Variable Waist-Diameter Mach-Zehnder Tapered-Fiber Interferometer as Humidity and Temperature Sensor

• DOI: 10.1109/jsen.2016.2573961
• 发表时间: 2016-08-01
• 期刊: IEEE SENSORS JOURNAL
• 影响因子: 4.3
• 作者: Soltanian, M. R. K.;Sharbirin, A. S.;Ahmad, H.
• 通讯作者: Ahmad, H.

Fibre Bragg Grating-Based Cascaded Acoustic Sensors for Potential Marine Structural Condition Monitoring

• DOI: 10.1109/jlt.2016.2587161
• 发表时间: 2016-10-01
• 期刊: JOURNAL OF LIGHTWAVE TECHNOLOGY
• 影响因子: 4.7
• 作者: Vidakovic, Miodrag;McCague, Colum;Grattan, Kenneth T. V.
• 通讯作者: Grattan, Kenneth T. V.

Rigorous Design and Optimization of a New Generation of Optical Sensors

• 发表时间: 2014-09
• 期刊: Journal of the Indian Institute of Science
• 影响因子: 2.3
• 作者: Azizur B. Rahman;K. Kejalakshmy;C. Viphavakit;C. Themistos;M. Rajarajan;K. Grattan