激光与光电子学进展, 2017, 54 (12): 120603, 网络出版: 2017-12-11
FBG宏应变传感器的混凝土梁斜裂缝监测 下载: 618次
Oblique Crack Monitoring of Concrete Beam with Macro FBG Strain Sensor
光纤光学 健康监测 平均切应变 交叉拓扑 斜裂缝 长标距 fiber optics health monitoring average shear strain crossed topology oblique crack long gauge
摘要
以桥梁健康监测为目的, 利用自制标距的光纤布拉格光栅(FBG)宏应变传感器测量平均切应变, 识别斜裂缝的出现。以长标距光纤布拉格光栅(FBG)传感器为测量元件, 设计5组交叉拓扑, 利用交叉拓扑理论对混凝土T型梁的不同部位进行了测量, 分析了交叉拓扑覆盖范围内结构的平均切应变与荷载比例关系。结果表明, 长标距FBG交叉拓扑的测量方法能够有效识别斜裂缝的出现与发展, 在工程实际中具有较好的应用价值。
Abstract
In order to meet the needs of bridge structure health monitoring, the home-made long-gauge fiber Bragg grating (FBG) macro strain sensor is used to measure average shear strain and identify occurrence of oblique cracks. The FBG is used as a measuring element and five couples of crossed topologies are designed. We use the cross topological theory to measure different parts of concrete T-beam, and analyze relationship between the average shear strain of the structure and load in crossed topological coverage. The experimental results show that the measuring method of the long-gauge FBG crossed topology is effective to identify occurrence and development of oblique cracks, and this method has good application value in engineering practice.
庞香润, 王大鹏. FBG宏应变传感器的混凝土梁斜裂缝监测[J]. 激光与光电子学进展, 2017, 54(12): 120603. Pang Xiangrun, Wang Dapeng. Oblique Crack Monitoring of Concrete Beam with Macro FBG Strain Sensor[J]. Laser & Optoelectronics Progress, 2017, 54(12): 120603.