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

包括公路桥梁和近海结构在内的老化基础设施的恶化具有重大的社会和人类后果。桥梁由于交通拥堵、维修延迟或极端气候事件等原因，通常会发生渐进性破坏。因此，有必要对既有老化桥梁的健康状况进行评估，确保其安全可靠运行。我的工业合作伙伴，WSP的工程部门，强烈依赖基于定期目视检查的维护方法，这种方法更容易，但更容易发生恐怖事件，而且成本高昂。为了确保它们的平稳运行，需要更新的状态维护和实时监控，以便能够以最具成本效益的方式及时检测到任何损坏。这项建议的主要目标是开发并与我们的合作伙伴分享有效的、基于状态的维护技术，用于桑德湾市的桥梁。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全球损伤，然后进行适当的修复和翻新。这项研究将开发一种自动化的远程损伤诊断和决策工具，可以方便地用于在极端天气条件下监测桥梁。与WSP目前使用人工预防性维护的做法不同，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检测灾难性故障的过程，从而将总体维护成本降至最低。一旦开发出来，您的合作伙伴或包括加拿大交通部在内的其他加拿大基础设施所有者可以使用建议的工具，在恶劣天气条件下对其他大城市的关键桥梁进行改造，从而使结构修复更具时间和成本效益。这种自主和远程翻新技术将有助于降低加拿大省级和联邦政府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.