Development of innovative methods for structural health monitoring and related improvement of structural performance and resilience

开发结构健康监测的创新方法以及结构性能和弹性的相关改进

• 批准号: RGPIN-2017-06658
• 负责人: Bagchi, Ashutosh
• 金额: $ 2.04万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746375
• 关键词: Development; innovative; methods; structural; health

A large part of our infrastructure was built in mid-seventies and they are in urgent need of rehabilitation and/or reconstruction. In order to reduce the vulnerability of structures to operational and extreme loadings (e.g., earthquake), it is important to determine their structural conditions and capacity through regular inspection and Structural Health Monitoring (SHM) techniques. This is essential for making effective decisions on structural rehabilitation, and take advantage of high performing materials (e.g., high strength concrete, fiber reinforced polymer or FRP), and new devices and systems (e.g., dampers and control systems) to improve the structural performance and resilience.The long term goal of the proposed research is to develop effective methods to achieve sustainable and resilient infrastructure. The short term goals are to: (1) develop innovative SHM techniques for evaluation of the in-situ performance of structures, and (2) develop practical methods to improve structural performance and resilience to operational and extreme events (e.g. earthquake) using the SHM-based condition assessment.To achieve Goal 1, the proposed research program will focus on the development of new sensing methods for monitoring, system identification and damage detection techniques in structures. Particular attention will be given to wireless sensors for SHM and their performance will be studied in the laboratory and field. A number of issues including optimal placement of sensors, appropriate deployment mechanism, detecting sensor malfunction, environmental effect on monitoring data, detecting novel events (e.g., earthquake), identify system properties, and detect structural damage will be addressed in this research.To achieve Goal 2, the present research will focus on new materials and technologies such as advanced composites and damping devices to upgrade the performance of a structure. Particular attention will be given to magneto-rheological (MR) fluid-based semi-active dampers in controlling vibration response in structures. Effective application of these devices requires simplified methods to model them in a structural system, which will be addressed here by developing a simplified modelling technique for such devices and integrating them to structural models to analyze their performance. The functioning of a semi-active device can be directly tied to the SHM system of a structure as such a device requires feedback from structure in terms of its dynamic response.The proposed research program will be built upon the applicant's ongoing work in the above areas. There is significant potential for innovation in the proposed research which aims at enhancing the fundamental knowledge in the above areas. The outcome of the research is expected to enhance the safety of the civil and built infrastructure and benefit the Canadian society.

我们的基础设施很大一部分建于七十年代中期，迫切需要修复和/或重建。为了减少结构对运行和极端载荷（例如地震）的脆弱性，通过定期检查和结构健康监测（SHM）技术确定其结构状况和能力非常重要。这对于做出有效的结构修复决策至关重要，并利用高性能材料（例如高强度混凝土、纤维增强聚合物或 FRP）以及新设备和系统（例如阻尼器和控制系统）来提高结构性能和弹性。拟议研究的长期目标是开发有效的方法来实现可持续和弹性基础设施。短期目标是：(1) 开发创新的 SHM 技术来评估结构的原位性能，(2) 使用基于 SHM 的条件评估开发实用方法，以提高结构性能以及对运行和极端事件（例如地震）的恢复能力。为了实现目标 1，拟议的研究计划将重点开发用于结构监测、系统识别和损伤检测技术的新传感方法。将特别关注用于 SHM 的无线传感器，并将在实验室和现场研究它们的性能。这项研究将解决许多问题，包括传感器的最佳放置、适当的部署机制、检测传感器故障、环境对监测数据的影响、检测新事件（例如地震）、识别系统属性和检测结构损坏。为了实现目标2，本研究将重点关注新材料和技术，例如先进复合材料和阻尼装置，以提升结构的性能。将特别关注基于磁流变（MR）流体的半主动阻尼器在控制结构振动响应方面的作用。这些设备的有效应用需要简化的方法来在结构系统中对它们进行建模，这里将通过开发此类设备的简化建模技术并将它们集成到结构模型中以分析其性能来解决这一问题。半主动装置的功能可以直接与结构的 SHM 系统联系在一起，因为这种装置需要结构在其动态响应方面的反馈。所提出的研究计划将建立在申请人在上述领域正在进行的工作的基础上。拟议的研究具有巨大的创新潜力，旨在增强上述领域的基础知识。研究成果预计将提高民用和建筑基础设施的安全性，造福加拿大社会。