光纤光栅型钢绞线成品拉索的研制  

Development of Finished Fiber-Optic Grating Type Steel Strand Ties

作　　者：余文成[1,2] 欧维 朱万旭 雷芸[1,2] 沈全喜 Yu Wencheng;Ou Wei;Zhu Wanxu;Lei Yun;Shen Quanxi(College of Civil Engineering and Architcture,Guilin University of Technology,Guilin 541004,Guangxi,China;Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin 541004,Guangxi,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《激光与光电子学进展》2024年第15期82-87,共6页Laser & Optoelectronics Progress

基　　金：广西科技基地和人才专项(桂科AD20159085)。

摘　　要：拉索是索类工程结构的主要承载构件,拉索智慧化可为拉索服役状态评估提供数据支撑,对结构的长期安全运营具有重要意义。为提高光纤光栅传感器的存活率和探究内嵌传感器对成品拉索承载性能的影响,提出每根钢绞线中心丝刻槽内嵌5个传感器,并通过端堵钻孔引出光纤线束的方案,配制三个光纤光栅型钢绞线成品拉索试件进行静载张拉试验,试验结果表明:张拉过程中传感器存活率达100%,索力监测范围可达破断荷载的80%,拉索锚固效率系数>97%。光纤光栅传感器内嵌封装在中心丝并通过钻孔引出的方法保证了传感器的存活率,实现拉索轴向应力的可靠监测。成品拉索平均承载力为821 kN,钢绞线中心丝刻槽内嵌传感器的成品拉索保持良好的承载性能,满足工程运用要求。Since cables are the main load-bearing member of cable structures,it is important to assess their service condition,using data from sensors,to ensure the long-term safe operation of the structures.To improve the survival rate of fiber grating sensors and investigate the effect of embedded sensors on the load-bearing performance of finished ties,five sensors are embedded in the center wire groove of each strand.Moreover,the fiber-optic harness is led through the end plug drilling.Three fiber-optic grating type strand specimens are prepared in order to conduct a static load tensioning experiment.The test results show that the sensor survival rate during tensioning is 100%,the cable force monitoring range is up to 80%of the breaking load,and the cable anchoring efficiency factor is more than 97%.By embedding the fiber grating sensor in the center wire and leading it out through the drilling method,the survival rate of the sensor is ensured and reliable monitoring of the axial stress of the cable is achieved.The average load capacity of the finished cable is 821 kN.The finished cable with the sensor embedded in the slot of the center wire of the strand maintains a good loadbearing performance and meets the requirements for engineering applications.

关 键 词：光纤光栅传感器 钢绞线拉索 锚固结构 静载试验 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]