Monitoring the corrosion process of reinforced concrete using BOTDA and FBG sensors.

Monitoring the corrosion process of reinforced concrete using BOTDA and FBG sensors.
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使用 BOTDA 和 FBG 传感器监测钢筋混凝土的腐蚀过程

DOI:
10.3390/s150408866
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发表时间:
2015-04-15
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
He Y
He Y
中科院分区:
其他
文献类型:
--
作者:
Mao J;Chen J;Cui L;Jin W;Xu C;He Y

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钢筋锈蚀引起的混凝土膨胀开裂是混凝土耐久性失效的主要原因。因此,混凝土裂缝监测是评估混凝土结构安全性的关键。基于混凝土膨胀开裂的力学原理,提出了一种将布里渊光时域分析(BOTDA)和光纤光栅(FBG)相结合的新型监测方法。BOTDA监测混凝土膨胀和裂缝宽度,而FBG则确定裂缝的时间和位置。通过水压加载模拟试验,研究了纤维应变、混凝土膨胀与裂缝宽度的关系。电加速腐蚀试验也进行了评估这种新型传感器的能力,监测混凝土开裂在实际条件下。
Expansion and cracking induced by the corrosion of reinforcement concrete is the major factor in the failure of concrete durability. Therefore, monitoring of concrete cracking is critical for evaluating the safety of concrete structures. In this paper, we introduce a novel monitoring method combining Brillouin optical time domain analysis (BOTDA) and fiber Bragg grating (FBG), based on mechanical principles of concrete expansion cracking. BOTDA monitors concrete expansion and crack width, while FBG identifies the time and position of cracking. A water-pressure loading simulation test was carried out to determine the relationship between fiber strain, concrete expansion and crack width. An electrical accelerated corrosion test was also conducted to evaluate the ability of this novel sensor to monitor concrete cracking under practical conditions.
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发表时间: 2012-11-14
期刊: Sensors (Basel, Switzerland)
影响因子: --
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