SST: Polymer Fiber and Waveguide Sensors for Perofmance-Based Assesment and Health Monitoring of Civil Infrastructure Systems

SST：聚合物光纤和波导传感器，用于民用基础设施系统的性能评估和健康监测

• 批准号: 0428301
• 负责人: Tasnim Hassan
• 金额: --
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0428301&HistoricalAwards=false
• 关键词: SST; Polymer; Fiber; Waveguide; Sensors

Abstract0428301T. HassanNC State UnivThe research described in this proposal aims to develop polymer waveguide sensors for the performance-based assessment and health monitoring of civil infrastructure systems. Although the sensors to be developed can be utilized to measure strains under a variety of load conditions and structural materials, this research program will focus on application of the sensors to concrete and steel structures subjected to dynamic load conditions. In order to truly understand the failure mechanisms of structures, it will be essential to have reliable sensors that can measure large strains, at least up to 10%, at high strain rates, up to 3% per second. The specific objectives of the proposed research are to develop (1) an interferometric polymer optical fiber sensor for the measurement of distributed strains and/or localized strains and (2) a minimally invasive, high sensitivity polymer planar waveguide sensor for embedment into particular structural systems. The objectives of the research will be achieved by sensor design, which includes finite element modeling of the sensors and optimization of their response through a genetic algorithm. Sensor development will be evaluated by a combination of lab and field studies in conjunction with non-linear response history analyses. The polymer sensors to be developed will have significant immediate implications for structural testing as researchers would gain previously unavailable insight into the mechanisms of inelastic deformation and damage accumulation. Furthermore, since polymer waveguide sensors can be embedded within structures, they have great potential in the field of health monitoring of composite structures and asphalt concrete pavements. Through the educational plan proposed, one graduate student will work with the international collaborator, Professor Calvi, on the historic structures located in Italy. In addition, pre-college students will participate in the project through the expansion of an existing program at North Carolina State University.

摘要0428301 T。该提案中描述的研究旨在开发聚合物波导传感器，用于民用基础设施系统的性能评估和健康监测。虽然要开发的传感器可以用来测量各种负荷条件下的应变和结构材料，本研究计划将集中在传感器的应用，受到动态负荷条件下的混凝土和钢结构。为了真正了解结构的失效机制，必须有可靠的传感器，可以在高达每秒3%的高应变率下测量至少高达10%的大应变。提出的研究的具体目标是开发（1）用于测量分布应变和/或局部应变的干涉聚合物光纤传感器和（2）用于嵌入特定结构系统的微创、高灵敏度聚合物平面波导传感器。研究的目标将通过传感器设计来实现，其中包括传感器的有限元建模和通过遗传算法优化其响应。传感器开发将通过实验室和现场研究结合非线性响应历史分析进行评价。待开发的聚合物传感器将对结构测试产生重大的直接影响，因为研究人员将获得以前无法获得的对非弹性变形和损伤累积机制的深入了解。此外，由于聚合物波导传感器可以嵌入到结构中，它们在复合结构和沥青混凝土路面的健康监测领域具有很大的潜力。通过提出的教育计划，一名研究生将与国际合作者卡尔维教授一起研究位于意大利的历史建筑。此外，大学预科学生将通过扩大北卡罗来纳州州立大学的现有项目参与该项目。