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智能混凝土使用基于布拉格格嵌在水泥混合物中的光学传感器:治愈监测和光束测试
Edson Souza1, Pâmela Pinheiro2, Felipe Coutinho2
1Graduate Program in Electrical Engineering, Federal University of Espírito Santo, Vitória 29075-910, ES, Brazil.
Sensors (Basel, Switzerland)
|January 8, 2025
概括
这项研究介绍了一种新的智能混凝土系统,使用纤维布拉格格 (FBG) 传感器来监测混凝土固化,包括收缩,温度和湿度. 该系统在曲测试中成功跟踪了这些参数和结构应变,提高了混凝土监测能力.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 传感器技术 传感器技术
背景情况:
- 智能混凝土集成了传感和结构功能,以改善建筑.
- 不充分的混凝土固化可以导致收缩裂和降低机械强度.
- 监测混凝土固化对于结构完整性和性能至关重要.
研究的目的:
- 开发使用纤维布拉格格 (FBG) 传感器的单一测量系统,用于监测混凝土固化参数.
- 在混凝土固化过程中评估自身收缩应变,温度和相对湿度 (RH).
- 评估嵌入式FBG传感器在负载下的智能混凝土结构中的性能.
主要方法:
- 使用纤维布拉格格网 (FBG) 传感器来测量自身收缩应变,温度和相对湿度 (RH).
- 使用K型热电偶作为参考温度传感器.
- 在混凝土样本中嵌入FBG应变传感器,用于在模拟梁曲测试期间进行监控.
主要成果:
- 该系统准确地测量了最大自生收缩应变 (高达213.64m) 和相对湿度 (高达98.20%RH).
- 使用FBG传感器记录的最高温度达到63.65°C.
- 在曲测试中,FBG传感器在整个负载周期中保持了信号完整性,测量了高达123.71 μm的应变.
结论:
- 开发的FBG传感器系统可以实时有效地监测重点混凝土固化参数.
- 该系统可以将传统的混凝土结构转化为具有集成传感的智能结构.
- 这项技术为改善混凝土设计,施工和长期结构健康监测提供了巨大的潜力.
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