FBG传感器关于裂缝及损伤的监测应用研究

摘要

为了满足结构健康监测的需求,采用试验方法研究了准分布式光纤布喇格光栅(FBG)传感器在裂缝监测和损伤定位中的应用.以钢筋混凝土简支梁和工字型钢梁为试验对象,对梁关键部位划分单元进行多点监测,取得了其应变变化的数据,并进行了分析以实现裂缝监测和损伤定位.结果表明,准分布式FBG传感器能够较为准确地对裂缝的发生及所测区域的损伤情况实现定位.%In order to meet the needs of structure health monitoring, the application of quasi-distributed fiber Bragg grating (FBG) sensor in crack monitoring and damage localization was studied in experimental method. By choosing the simply supported reinforced concrete beam and an H-shaped steel beam as the test object, the key location of the beam was divided into several units of multi-point monitoring to obtain the data of the strain. The data was analyzed to achieve the crack monitoring and damage location. The results show that quasi-distributed FBG sensor can accurately locate the occurrence of cracks and damage of the measured area.