Strain Measurement Using Embedded Fiber Bragg Grating Sensors Inside an Anchored Carbon Fiber Polymer Reinforcement Prestressing Rod for Structural Monitoring
Strain Measurement Using Embedded Fiber Bragg Grating Sensors Inside an Anchored Carbon Fiber Polymer Reinforcement Prestressing Rod for Structural Monitoring
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DOI：
10.1109/jsen.2009.2018355
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发表时间：
2009-11-01
影响因子：
4.3
通讯作者：
Taljsten, Bjorn
中科院分区：
文献类型：
--
作者：
Kerrouche, Abdelfateh;Boyle, William J. O.;Taljsten, Bjorn
报告的结果是使用一系列基于布拉格光栅的光纤传感器进行的，这些传感器被写入非常短的长度（60 毫米）光纤网络并集成到碳纤维聚合物增强（CFPR）杆中。此类杆用作混凝土结构中的钢筋，并在测试中通过一系列拉力测试循环承受应变，所施加的力高达 30 kN。结果表明，可以从沿杆安装的不同传感器获得有效的应变测量。此外，测试表明，获得的结果与拉机施加的校准力以及安装在杆本身上的传统电阻应变计获得的结果非常一致。从应变到剪应力的计算显示，沿所用的钢筋锚栓的应力分布相对均匀。这些结果为这种 CFRP 杆在不同工程结构中使用时的应变现场监测的各种方法的结果提供了信心。
Results are reported from a study carried out using a series of Bragg grating-based optical fiber sensors written into a very short length (60 mm) optical fiber network and integrated into carbon fiber polymer reinforcement (CFPR) rod. Such rods are used as reinforcements in concrete structures and in tests were subjected to strain through a series of cycles of pulling tests, with applied forces of up to 30 kN. The results show that effective strain measurements can be obtained from the different sensors mounted along the rod. Additionally, the tests show that close agreement with the results obtained from the calibrated force applied by the pulling machine and from a conventional resistive strain gauge mounted on the rod itself is obtained. Calculations from strain to shear stress show a relatively uniform stress distribution along the bar anchor used. The results give confidence to results from various methods of in situ monitoring of strains on such CFRP rods when used in different engineering structures.