SGER: Structural Health Monitoring of Bridges Subjected to Seismic Loads Using Distributed Fiber Optic Sensors at the University of Nevada NEES Shaking Table Testing Facility

摘要：利用分布式光纤传感器对内华达大学NEES振动台试验设施的桥梁结构进行地震荷载下的健康监测（CMS-0523333PI: Farhad Ansari, U of Illinois，芝加哥）该有效载荷项目的目标是使用分布式光纤传感器对内华达大学里诺分校（UNR）振动台试验设施中正在进行的全尺寸桥梁进行结构健康监测。拟议的有效载荷项目将与目前的NEESR项目一起进行，该项目由联合国研究计划署的Saiidi教授指导，题为“传统和创新设计桥梁系统的抗震性能”。NEESR项目利用NSF NEES站点的大型振动台系统来详细了解多跨桥梁模型的桥梁抗震性能。测试项目包括单柱和双柱弯曲以及全尺寸桥梁。拟议有效载荷项目的目标是使用两种不同类型的分布式光纤传感器系统，在地震活动期间进行实时健康监测，并对梁柱节点、桥台和板跨进行地震后评估。将分析传感器的响应，以检查与落帽弯曲支撑的桥梁有关的各种设计问题。所提出的分布式传感系统将有效地开发用于评估损伤和验证分析方案和设计参数的确定性工具。串行复用光纤布拉格光栅传感器将用于动态响应的测量和损伤的实时检测。光纤长规分布式传感器将用于震后损伤评估和震后安全。目前正在联合国研究中心试验的桥梁模型包括传统的钢筋混凝土柱；混凝土填充纤维增强复合材料管，以及创新的减少损伤的材料，正在使用在塑料铰链发展的地方。分布式传感器系统的灾后评估方面将是该项目的一个重要方面，为评估地震事件后桥梁的健康和安全提供确定性工具。

Abstract for: Structural Health Monitoring of Bridges Subjected to Seismic Loads Using Distributed Fiber Optic Sensors at the University of Nevada NEES Shaking Table Testing Facility CMS-0523333PI: Farhad Ansari, U of Illinois, ChicagoThe objective for the proposed payload project is to use distributed fiber optic sensors for structural health monitoring of the full scale bridges that are currently being tested at the University of Nevada, Reno (UNR) shaking table facility. The proposed payload project will be conducted in conjunction with the current NEESR project, which is under the direction of Professor Saiidi at UNR, entitled as "Seismic Performance of Bridge Systems with Conventional and Innovative Design". The NEESR project makes use ofthe large-scale shake table systems at the NSF NEES site to develop detailedunderstanding of bridge seismic performance of multi-span bridge models. The testingprogram encompasses single and two-column bents as well as full-scale bridges.The objective for the proposed payload project is to use two different types of distributedfiber optic sensor systems for real-time health monitoring during seismic activities andfor post seismic evaluation of beam column joints, abutments, and slab spans. The sensor response will be analyzed to examine the various design issues related to bridges supported on drop cap bents. The proposed distributed sensory system will be effective in development of deterministic tools for assessment of damage and verification of analysis schemes and design parameters. The serially multiplexed fiber Bragg gratingsensors will be used for measurement of dynamic response and real time detection ofdamage. Fiber Optic Long gauge distributed sensors will be used for post seismic damage assessment and safety following of an earthquake. The bridge models currently being tested at UNR include conventional reinforced concrete columns; concrete filled fiber reinforced composite tubes as well as innovative damage reducing materials that are being used in the locations where plastic hinges develop. The post hazard evaluation aspect of the distributed sensor system will be an important aspect of the project providing a deterministic tool for assessing the health and safety of bridges following seismic events.