光纤传感技术在土木工程健康监测中的应用

Application of Optical Fiber Sensing Technology in Civil Engneerig Structural Safety and Health Monitoring

针对传统结构的监测仪器存在的缺陷,光纤传感技术正逐步取代传统监测技术应用于土木工程结构健康监测,对单个物理量进行测试已取得可靠成果。但是,通过采用同一根光缆同时监测结构多种物理量来评价工程结构安全与健康,即联合监测在国内并不多见。介绍了分布式光纤传感技术的优势及测试原理,结合工程实例,研究了分布式光纤传感技术应用于土木工程结构健康监测的方式,并探讨了存在的主要问题及解决办法。研究结果表明,该技术应用于结构安全与健康监测是可行的。

Based on the characteristics and advantages of optical fiber sensing technology in our country,the optical fiber sensing technology is being used gradually in structural health monitoring in civil engineering;the technology of measuring the single physical quantity has advanced and obtained reliable results.But it is the first time in our country to measure multi-physical quantity by one distributed optical fiber and evaluate the structural safety and health in civil engineering.This paper introduced the advantages of distributed optical fiber sensing technology and testing principle.Besides,based on the engineering example,the combined use of distributed optical fiber sensing technology in civil engineering structural safety monitoring is introduced,and the main problems and the solution are discussed.