一层基于离散粒子的软接触模型在腐蚀的铁杆监测中使用线性和非线性超声波引导波
Shi Yan1, Xuenan Wang1, Ruifeng Zhu1
1School of Civil Engineering, Shenyang Jianzhu University, Shenyang, China.
Ultrasonics
|February 28, 2024
概括
在海上结构中早期检测钢筋腐蚀至关重要. 这项研究引入了一种新的超声波引导波 (UGWs) 方法,以有效监测钢筋腐蚀,提高结构耐用性.
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:
- 在海上钢筋混凝土 (RC) 结构中,杆腐蚀显著损害了耐用性.
- 早期检测铁杆腐蚀仍然是一个重大挑战.
研究的目的:
- 开发和验证一种方法来监测RC结构中钢筋腐蚀的整个过程.
- 建立一种可靠的技术,用于检测早期的钢筋腐蚀.
主要方法:
- 开发了一种机械模型,将铁杆腐蚀扩张与破裂的RC元件中的接触压力联系起来.
- 一个软压力依赖接触2D模型模拟了局部腐蚀层.
- 建议使用基于PZT的UGW进行线性和非线性信号联合分析 (LNSJA) 方法.
主要成果:
- 在LNSJA方法有效地检测到微和宏厚的钢筋腐蚀层.
- 在LNSJA的基础上,开发了一种铁杆腐蚀损伤指数 (RCDI).
- 该方法的有效性通过实验验证和有限元素分析 (FEA) 得到证实.
结论:
- 拟议的LNSJA方法和RCDI提供了一种有效的方法来监测RC结构中的钢筋腐蚀.
- 这种技术可以提高对腐蚀性环境中的结构完整性和耐久性的评估.
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