基于纤维布拉格格雷传感器的混凝土碳化评价
Jianzhi Li1, Haiqun Yang2, Handong Wu2
1Key Laboratory of Structural Health Monitoring and Control, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.
Micromachines
|January 23, 2024
概括
混凝土碳化会随着时间的推移增加其机械性能,如弹性模量和压力强度. 纤维布拉格格 (FBG) 传感器为评估混凝土提供了一种新方法.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构健康监测 结构健康监测
背景情况:
- 混凝土碳化显著影响其耐用性和使用寿命.
- 了解碳化和机械性能之间的关系对于基础设施评估至关重要.
- 评估碳化度的传统方法可能耗时且具有破坏性.
研究的目的:
- 通过使用纤维布拉格格 (FBG) 传感器,研究混凝土碳化及其机械性能之间的相关性.
- 开发一种数学模型,根据碳化时间来预测混凝土的弹性模量.
- 建立FBG传感器作为可靠的工具来检测混凝土碳化.
主要方法:
- 使用T130高灵敏度应变电缆传感器 (FBG传感器) 来监测内部应变和弹性模量.
- 采用甲烯溶液测试来测量碳化深度.
- 进行压力强度测试以评估混凝土的机械阻力.
- 开发了一个数学模型,将弹性模量,碳化时间和FBG测量联系起来.
主要成果:
- 混凝土的碳化深度,压力强度和弹性模量都随着碳化时间的增加而增加.
- 这些属性最初呈现出快速增长,随后在后期阶段增长较慢.
- 在弹性模量和压力强度趋势之间观察到一致的二项关系.
- FBG传感器对弹性模量进行的测量与碳化进展有很好的相关性.
结论:
- 通过FBG传感器测量弹性模量,可以有效地描述混凝土的碳化阻力.
- FBG传感器为监测混凝土碳化提供了一种新且潜在的非破坏性方法.
- 这项研究为检测和评估由于碳化而导致的混凝土降解提供了新的途径.
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