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Crack detection study for hydraulic concrete using PPP-BOTDA

机译：基于PPP-BOTDA的水工混凝土裂缝检测研究

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摘要

Effectively monitoring the concrete cracks is an urgent question to be solved in the structural safety monitoring while cracks in hydraulic concrete structures are ubiquitous. In this paper, two experiments are designed based on the measuring principle of Pulse-Pre pump Brillouin Optical Time Domain Analysis (PPP-BOTDA) utilizing Brillouin optical fiber sensor to monitor concrete cracks. More specifically, "V" shaped optical fiber sensor is proposed to determine the position of the initial crack and the experiment illustrates that the concrete crack position can be located by the mutation position of optical fiber strain. Further, Brillouin distributed optical fiber sensor and preinstall cracks are set at different angles and loads until the optical fiber is fractured. Through the monitoring data, it can be concluded that the variation law of optical fiber strain can basically reflect the propagation trend of the cracks in hydraulic concrete structures.
机译：在水工混凝土结构裂缝普遍存在的同时，有效监测混凝土裂缝是结构安全监测中亟待解决的问题。根据脉冲预泵布里渊光学时域分析（PPP-BOTDA）的测量原理，利用布里渊光纤传感器监测混凝土裂缝，设计了两个实验。更具体地，提出了“ V”形光纤传感器来确定初始裂纹的位置，并且该实验说明了可以通过光纤应变的突变位置来定位混凝土裂纹的位置。此外，将布里渊分布式光纤传感器和预安装裂缝设置为不同的角度和负载，直到光纤断裂为止。通过监测数据可以得出，光纤应变的变化规律可以基本反映出水工混凝土结构裂缝的扩展趋势。

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  • 来源
    《Smart structures and systems》 |2017年第1期|75-83|共9页
  • 作者

    Huang Xiaofei; Yang Meng; Feng Longlong; Gu Hao; Su Huaizhi; Cui Xinbo; Cao Wenhan;

  • 作者单位

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China|Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China|Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China;

    Gansu Middle East Construct Management Consulting, Lanzhou 730030, Gansu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China|Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China|Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China;

    Informat Ctr Land & Resources Binzhou City, Binzhou, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China|Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China|Natl Engn Res Ctr Water Resources Efficient Utili, Nanjing 210098, Jiangsu, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    concrete cracks; safety monitoring; Brillouin distributed optical fiber sensor;

    机译：混凝土裂缝;安全监测;布里渊分布式光纤传感器;

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