Development of innovative methods for performance-driven design and health monitoring of structures

我们的很大一部分基础设施是在七十年代中期建造的，它们迫切需要恢复和/或重建。为了减轻现有和新结构在运行和极端荷载(如地震)下的脆弱性，需要有效和准确的设计和评估方法。 拟议研究计划的长期目标是为结构的基于性能的设计(PBD)、修复和监测开发实用方法；并通过帮助开发下一代规范、标准和设计指南来促进结构工程的实践。短期目标被确定如下：(1)开发基于性能的抗震设计(PBSD)和建筑物修复的实用方法；(2)开发针对多危险事件，特别是震后火灾(PEF)中的建筑物的基于性能的抗震设计方法；(3)开发用于建筑物抗震性能监测和震后评估的结构健康监测策略。 为了实现目标1，将开发一种基于直接位移和损伤的建筑设计方法。这项拟议的研究将试图扩展现有的方法，以开发一种基于目标位移和破坏的直接估计的实用建筑设计方法。然后，将其扩展到开发一种新的基于性能的建筑物修复方法，该方法使用带有磁流变(MR)流体阻尼器的半主动控制系统的调谐质量阻尼器(TMD)。 为了实现目标2，将根据建筑物框架/副框架在水平荷载和高温作用下的数值和实验研究来更新上述PBD方法，以模拟震后火灾。虽然有一些关于受脉冲电场危害的建筑物的数值研究，但还没有关于这一领域的实验研究。这项研究的实验部分将利用可控辐射加热板来模拟标准火灾中的温度。 为了实现目标3，将开发一种基于模型和数据驱动的混合方法，用于利用结构健康监测(SHM)数据快速评估建筑物的抗震性能和震后评估。该方法结合了基于模型(需要被监测结构的有限元模型)和数据驱动(只考虑数据模式和特征)的优点。建议的混合方法将利用一座仪表化建筑的振动数据进行开发和演示。 拟议的研究计划将建立在申请者在上述领域正在进行的工作的基础上。拟议的研究具有很大的创新潜力，其目的是为加拿大的利益发展安全和可持续的民用基础设施，并培训高素质的人员，为该专业和整个社会做出贡献。

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 mitigate the vulnerability of the existing and new structures to operational and extreme loads (e.g. earthquakes), efficient and accurate methods for design and assessment are needed. The long term goals of the proposed research program are to develop practical methods for performance-based design (PBD), rehabilitation, and monitoring of structures; and to contribute to the practice of structural engineering by aiding in the development of next generation codes, standards and design guidelines. The short term goals are identified as follows: (1) develop practical methods for performance-based seismic design (PBSD) and rehabilitation of buildings, (2) develop a PBD method for buildings in multi-hazard events, especially post-earthquake fires (PEF), and (3) develop structural health monitoring strategies for seismic performance monitoring and post-earthquake assessment of buildings. To achieve Goal 1, a direct displacement and damage-based method for building design will be developed. The proposed research will attempt to extend existing methods to develop a practical design method for buildings based on a direct estimation of the target displacement and damage. Then, it will be extended to develop a new method for performance-based rehabilitation of buildings using tuned mass dampers (TMDs) with semi-active control systems with magneto-rheological (MR) fluid dampers. To achieve Goal 2, the PBD methods developed above will be updated based on numerical and experimental studies on building frame/sub-frames subjected to lateral loads and high temperature to simulate post-earthquake fire. While there are some numerical studies available on buildings subjected to PEF hazard, there is no experimental study available in this area. The experimental part of the study will utilize controllable radiant heating panels to simulate the temperature in a standard fire. To achieve Goal 3, a hybrid model-based and data-driven method will be developed for rapid assessment of seismic performance and post-earthquake evaluation of buildings using structural health monitoring (SHM) data. The proposed method will combine the advantages of both model-based (requiring finite element model of the monitored structure) and data-driven (considering only data patterns and features). The proposed hybrid method will be developed and demonstrated using vibration data from an instrumented building. 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 developing safe and sustainable civil infrastructure for the benefit of Canada, and train highly qualified personnel to contribute to the profession and the society at large.