'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用混凝土等现代材料建造的，已经或将需要广泛的维修，在使用中-通常是在其设计寿命相对较短的时期之后，或者为了延长寿命和降低“新建筑”的成本。目前，仅在英国，每年在混凝土基础设施维修和维护上的支出估计就达6亿美元，发达国家的这一数字是这个数字的数倍。可使用性和增强的全寿命性能是有效使用的关键，而对这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和提供物有所值的服务是非常宝贵的。此外，混凝土基础设施有一个明确的未来：发展使用寿命长的轻质材料被认为是可持续发展的关键，例如使用高耐久、轻质、低能量的混凝土，这种混凝土可用于一种新型的预制产品，并在其中纳入先进的监测系统。然而，要实现基础设施的最大价值，关键是更充分地了解需求和挑战，以便在现有结构的使用寿命期间对其进行更好的评估，并使用新材料为未来创造更好的结构。在这两种情况下，都需要开发和广泛使用已安装或改装的有效监测系统，以提供可靠和信息丰富的数据，并得到用户群体和业界的信任。因此，监测和评估维修策略的效果，作为结构健康监测的一个关键方面，是本提案的目标。这在这个项目中是独一无二的，这是由于两个因素的共同作用-桥梁的可用性，自桥梁移动到现在的地点以来所应用的损坏情况将是众所周知的和密切记录的(作为NPL所做工作的一部分)，以及已经和将对其应用的修复策略。在这个项目中解决这一问题的是使用新的、校准的监测设备，在修复程序本身和随后的两种情况下都应用，以便能够定量地监测修复对桥梁的影响，因此这项工作非常补充并增加了目前在NPL的研究的价值。传统的SHM提供了一种评估，使大型工程资产的所有者能够更准确地安排维护，并可以对可能的结构故障发出早期警告。本项目中提议的那种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：这里的提议将使维修战略得以确定、监测和评估。因此，总体目标是为了获得更好的信息，以预测可能的故障可能性、修复的需要、修复的效率，从而预测桥梁等结构的可能寿命。这承认了工业对预测系统的广泛需求，这种系统可以监控结构，并向资产持有人通报其健康状况，包括其物理结构和化学变化，其中结构的类型可能包括桥梁、建筑物、发电厂、飞机、化工厂等。即使只是考虑桥梁的情况，简单明确地指示结构的健康状况也将提供可观的经济效益，因为仅在英国就有超过1万座桥梁，每座价值超过100万英镑--提供有效的维修，从而减少维护和运营成本，因此将带来巨大的好处。

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