Serviceability assessment and monitoring of aging structures using in-service vibration data

老化的基础设施，包括公路桥梁和海上结构的恶化，对社会和人类造成了重大影响。进行性损害通常发生在桥梁上，原因是意外的交通繁忙、延期维修或极端气候事件。因此，有必要对既有老化桥梁进行健康评估，确保其安全可靠运行。我的工业合作伙伴科进（wsp）的工程部门非常依赖定期目视检查的维护方法，这种方法更容易，但容易发生恐怖事件，而且价格昂贵。为了确保其顺利运行，需要更新的基于状态的维护和实时监控，以便及时发现任何损坏，并以最具成本效益的方式进行监测。该提案的主要目的是开发并与我们的合作伙伴分享基于状态的高效维护技术，用于桑德贝市的桥梁。挑战在于通过振动传感器检测到的异常症状来评估这些桥梁的局部和整体损坏，然后进行适当的修复和改造。这项研究将开发一种自动化的远程损伤诊断和决策工具，可以很容易地用于监测极端天气条件下的桥梁。与科进目前使用人工预防性维护的做法相反，拟议的基于传感器的技术将使我们的工业合作伙伴能够自动化检测灾难性故障的过程，从而最大限度地降低总体维护成本。一旦开发完成，建议的工具可以被您的合作伙伴或其他加拿大基础设施所有者（包括加拿大交通部）用于在恶劣天气条件下改造其他地铁城市的关键桥梁，从而使结构修复更具时间和成本效益。这种自主和远程改造技术将有助于降低省级和联邦政府对加拿大基础设施的整体维护成本。

Deterioration of aging infrastructure including highway bridges and offshore structures has significant societaland human consequences. Progressive damages commonly occur in bridges due to unexpected heavy traffic,deferred maintenance or extreme climatic events. Therefore, there is a need to assess the existing health ofaging bridges and ensure their safe and reliable operation. My industrial partner, the engineering division ofWSP, is strongly reliant on periodic visual inspection-based maintenance methods that are easier buterror-prone and expensive. Ensuring their smooth operation requires newer condition-based maintenance andreal-time monitoring, so that any damage can be detected in a timely and most cost-effective manner. The mainobjective of this proposal is to develop and share with our partner, efficient condition-based maintenancetechniques for the bridges in the City of Thunder Bay. The challenge lies in assessing the local and globaldamage of these bridges through the unusual symptoms detected by the vibration sensors, and then conductingappropriate rehabilitation and retrofitting. This research will develop an automated and remote damagediagnosis and decision making tool that can be readily used to monitor bridges under extreme weatherconditions. As opposed to WSP's current practice of using manual preventive maintenance, the proposedsensor-based technology will enable our industrial partner to automate the process of detecting catastrophicfailures, and therefore minimize overall maintenance costs. Once developed, the proposed tool can be used byour partner or other Canadian infrastructure owners including the Ministry of Transportation of Canada toretrofit critical bridges in other metro cities under adverse weather conditions, thereby making structuralrehabilitation more time- and cost-effective. Such autonomous and remote retrofitting technology will work toreduce the costs of overall maintenance on Canadian infrastructure for both the provincial and federalgovernments.