| 混凝土内部应变分布式光纤实时检测方法及试验研究 |
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| 引用本文： | 金伟良,毛江鸿,何勇.混凝土内部应变分布式光纤实时检测方法及试验研究[J].土木建筑与环境工程,2011,33(1):1-6. |
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| 作者姓名： | 金伟良 毛江鸿 何勇 |
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| 作者单位： | 浙江大学 结构工程研究所,杭州 310058;浙江大学 结构工程研究所,杭州 310058;浙江大学 结构工程研究所,杭州 310058 |
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| 基金项目： | 国家科技重大专项(2008ZX05026-002);浙江省教育厅科研项目(Y200908617) |
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| 摘 要： | 布里渊散射光时域分析技术(BOTDA)是1种新型光电监测技术,可对沿光纤轴向的应变、温度进行分布式监测,并具有长距离、分布式、高精度和耐久性等特点,适用于结构的健康监测.系统介绍了基于BOTDA的混凝土内部分布式应变的检测方法,并通过试验研究标定了由气吹再灌浆技术铺设的埋入式传感光纤的工作性能,解决了工程应用中无法将长...
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| 关 键 词： | 健康监测 应变检测 分布式光纤传感器 埋入式光纤 BOTDA |
Experimental Analysis on Real-time Distributed Strain Measurement in Concrete |
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| JIN Wei-liang,MAO Jiang-hong and HE Yong.Experimental Analysis on Real-time Distributed Strain Measurement in Concrete[J].土木建筑与环境工程,2011,33(1):1-6. |
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| Authors: | JIN Wei-liang MAO Jiang-hong and HE Yong |
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| Affiliation: | Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P. R. China;Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P. R. China;Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P. R. China |
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| Abstract: | The Brilliouin optical time domain analysis (BOTDA) is a newly developed technique adopted to measure and monitor the strain and temperature generated along optical fibers. The BOTDA has the characteristics of distributed measurement, long distance, high precision and durability, so it is suitable to structural health monitoring. Then a new optical fiber sensor embedded method based on air-blowing and vacuum grouting is introduced. It can lay the long distance distributed optical fiber into the concrete easily in short time. An experiment has been set up to study the validity of the new method, which shows that the embedded optical fiber can measure the concrete strain accurately, and it can realize the comprehensive, long-term, stable and real-time health monitoring to the civil structure. |
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| Keywords: | health monitoring strain measurement distributed optical fiber sensors embedded optical fiber BOTDA |
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