High-precision deformation monitoring for track girders in rapid rail transit

被引：0
作者：
Zhang Y. [1 ]
Li S.-Z. [1 ]
Zhang C. [1 ]
Chen S.-J. [1 ]
Sun W.-J. [1 ]
机构：
[1] Department of Building Engineering, Tongji University, Shanghai
来源：
Li, Su-Zhen (Lszh@tongji.edu.cn) | 2018年 / Zhejiang University卷 / 52期
关键词：
Accuracy; Deformation monitoring; Fiber Bragg grating(FBG); Long-gage; Rapid rail transit;
D O I：
10.3785/j.issn.1008-973X.2018.02.015
中图分类号：
学科分类号：
摘要：
A conjugate beam model was constructed to analyze the theoretical error of mid-span deflection in order to analyze the reliability of the long-gage fiber Bragg grating(FBG)in the deformation monitoring for track girders. Then the measurement error was considered to establish the precision of the long-gage FBG sensors for deformation measurement considering different gage length and measurement error. A field testing on a track girder was conducted to verify the reliability of the long-gage FBG and two optimization programs for the sensor layout was proposed. The identification error can be controlled within 1% when the number of sensor is over 8 and the value becomes 10% considering 20% measurement error. The relative error between the test result and the theoretical value is 2.01%, which indicates that the long-gauge FBG can achieve high precision deformation monitoring for track girders in rapid rail transit. © 2018, Zhejiang University Press. All right reserved.
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页码：325 / 332
页数：7
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