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

SGER：使用内华达大学 NEES 振动台测试设施的分布式光纤传感器对承受地震荷载的桥梁进行结构健康监测

• 批准号: 0523333
• 负责人: Farhad Ansari
• 金额: $ 8万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0523333&HistoricalAwards=false
• 关键词: SGER; Structural; Health; Monitoring; Bridges

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.

摘要：内华达州大学NEES振动台试验设施CMS-0523333 PI使用分布式光纤传感器对地震荷载作用下的桥梁进行结构健康监测：拟议的有效载荷项目的目标是使用分布式光纤传感器对目前正在内华达州大学进行测试的全尺寸桥梁进行结构健康监测，里诺（UNR）振动台设施。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UNR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现场的大型振动台系统，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排架以及全尺寸桥梁。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，用于地震活动期间的实时健康监测和梁柱接头、桥台和板跨的震后评估。将分析传感器响应，以检查与支撑在吊帽式排架上的桥梁相关的各种设计问题。建议的分布式传感系统将是有效的确定性的工具，用于评估的损坏和验证的分析方案和设计参数的发展。光纤光栅传感器将用于结构动力响应的测量和结构损伤的真实的实时检测。光纤长规格分布式传感器将用于地震后的破坏评估和地震后的安全。UNR目前正在测试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在塑性铰发展的地方使用的创新性损伤减少材料。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。