MUTLIPLE PURPOSES OF LONG-GAUGE FIBER OPTIC SENSORS TOWARDS STRUCTURAL HEALTH MONITORING

摘要：

　　A novel concept of area sensing based on long-gauge fiber optic sensors for structural health monitoring is presented in this paper.By designing the fiber optic sensor with a long gauge,it becomes possible to measure the distributed strain responses throughout the full at least most important areas of structures,thus not only local strain but also global information are obtained.Multiple purposes are achieved by desing the long-gaguc sensors for structural health monitoring as described below:(1) direct stratic and dynamic strain measurement; (2) deformation prediction from the long-gauge sensor output; (3) load identification from the distributed strain measurement; (4) modal analysis by using the dynamic macro-strain measurements for structural modal parameter identification; (5) damage detection by developing innovative macro-strain based damage indexes (like strain ratio).Advancement of the developed long-gauge fiber optic sensor technology is demonstrated by implementing it for structural monitoring and damage detection of several real bridges throughout the paper.

关键词： Long-gauge fiber optic sensor macro-strain distribution dynamic measurement load identification modal analysis dagnosis and prognosis

作者: Zhishen Wu Jian Zhang Yongsheng Tang

作者单位: International Institute for Urban Systems Engineering Southeast University, Nanjing 210096,P.R.China International Institute for Urban Systems Engineering Southeast University, Nanjing 210096,P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 163-175

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）