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Study on the Structural Deformation Monitoring Based on Distributed FBG Sensing Techniques

机译：基于分布式FBG传感技术的结构变形监测研究

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摘要

The deformation is an important parameter in structural health monitoring,and a conjugate beam method based on long-gauge fiber Bragg grating distributed strain sensing techniques is proposed to obtain the deformation of a structure.Some experiments are carried out to study the accuracy of this method using a four point bending RC beam under a step loading manner.The deformation obtained with the proposed method agrees well with those obtained with the conventional dial gauge in low loading steps.In addition,some measure is put forward to calibrate the proposed method and improve its accuracy at high loading steps,especially after the initiation of concrete cracks.
机译：变形是结构健康监测的重要参数，提出了一种基于长规格光纤布拉格光栅分布应变传感技术的共轭梁方法来获得结构的变形。使用四点弯曲RC梁在阶梯加载方式下进行。所提出的方法获得的变形与常规百分表在低载荷下获得的变形非常吻合。此外，还提出了一些措施来校准所提出的方法并进行改进在高载荷步骤下，尤其是在混凝土裂缝开始后，其精度很高。

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