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使用轴对称纵向导向波在接的袖子中检测解锁
Jiahe Liu1,2, Dongsheng Li1,2, Xiushi Cui1,2
1School of Civil Engineering, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel, Switzerland)
|November 25, 2023
概括
一种新的引导波结构健康监测 (SHM) 方法有效地检测了接袖 (GSs) 中的脱. 波包的到达时间随着解锁大小的增加线性减少,提供了可靠的检测方法.
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:
- 接套 (GSs) 是连接钢筋的关键预制接头.
- 在GS中脱,通常是由于接塞泄漏引起的,显著降低了结构性能.
- 目前用于检测GS解债的现有方法有限.
研究的目的:
- 开发和验证基于引导波的结构健康监测 (SHM) 方法,用于检测GSs中的脱节.
- 为了研究波传播特征与解接大小之间的关系.
- 为评估GS多层结构的完整性提供可靠的方法.
主要方法:
- 使用导向波传播,特别是轴对称纵向模式,用于SHM.
- 采用了八个对称放置的压电传感器 (PZT) 用于波动和信号接收.
- 调查了四个GS样本,具有不同的解锁大小.
- 进行了理论推导,数值模拟和实验验证.
主要成果:
- 建立了波包到达时间和解锁大小之间的理论关系.
- 证明到达时间随着脱债规模的增加线性减少.
- 通过数值模拟和实验测试验证这些发现,显示出一致的趋势.
结论:
- 基于引导波的SHM方法是有效的检测和量化GSs.在解绑.
- 抵达时间和解锁规模之间的线性相关性提供了一个定量评估工具.
- 这种方法为监测类似多层结构提供了有价值的参考.
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