检测的裂缝钢桥使用光纤传感器
乔丹斯特林机械工程师光波司
根据土木工程师(ASCE)在其2013报告卡为美国的基础设施,一个在团结状态四个桥是“要么结构缺陷或功能过时”的美国社会。It is approximated that $3.6 trillion is needed to improve the United States’ current infrastructure grade of D+ to an average grade of B. Infrastructure management teams require more detailed information about structural performance, yet current rating systems rely heavily on visual inspections, which can be highly variable and lead to inaccurate assessments. In a paper published by members of ASCE in the Journal of Engineering Mechanics, distributed fiber optic strain sensors were used to monitor and identify simulated cracking and distributed deterioration on steel specimens designed to simulate components of bridges. Strain measurements were taken with a月神OBR 4600系统。的OBR 4600能够提供应变测量下至长达70米的测量范围2mm的空间分辨率。在这项工作中,它被用来报告感测点沿着光纤传感器每10毫米。这些测量然后与箔片和数值有限元试样的模型,示出了作为下图证明良好的相关性。
本文报道说光纤传感器可用于精确地检测裂纹和测量的钢结构改变应变场。使用这些传感器来定位和检测关键桥梁构件的恶化可以帮助解决一些我们与我们目前缺乏的桥梁基础设施所面临的安全问题的能力。论文全文可从ASCE库,可在线访问这里。有关Luna的光纤传感解决方案的更多信息,请访问传感我们的网站的部分。***公开序号:霍尔特,N.,Ekim,O.,和雷吉尔,R。(2014)。损坏/性能下降检测中使用分布式光纤应变传感器钢结构。J.工程。。机甲,140(12),顶04014097.图像:“波特兰俄勒冈钢桥全景”由Matthew领域经由GFDL 1.2下许可维基共享资源