对加速反应的应用进行调查,用于使用二次回归来检测桥梁损坏的趋势线
Hadi Kordestani1, Chunwei Zhang2, Ali Arab2
1School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China.
Sensors (Basel, Switzerland)
|January 23, 2024
概括
本研究引入了一种新的基于趋势线的方法,使用二次回归来检测桥梁中的结构损伤. 该技术能够准确地识别损伤的位置和严重程度,即使在杂的环境中,也不需要基线数据.
科学领域:
- 结构工程 结构工程
- 土木工程 土木工程是指土木工程.
- 桥梁健康监测 桥梁健康监测
背景情况:
- 检测结构损坏对于基础设施安全至关重要.
- 以前的方法使用了Savitzky-Golay和移动平均线过器进行趋势线分析.
- 现有方法在噪音环境和基线依赖性方面存在局限性.
研究的目的:
- 开发和验证一种基于趋势线的新方法来识别结构损坏.
- 评估二次回归在分析加速响应损坏检测中的有效性.
- 在不同的卡车速度和损坏场景下评估拟议方法的性能.
主要方法:
- 使用二次回归来计算结构加速反应的趋势线.
- 使用趋势线的正常化能量作为损害指数.
- 在ABAQUS模型中,模拟结构损坏作为简单支桥梁的刚度降低.
- 测试了这种方法,用一辆卡车载的货物,以从1m/s到8m/s的速度进行测试.
主要成果:
- 提出的方法成功地在没有动态模式参数监测的情况下在杂的环境中识别了结构损伤.
- 与以前基于趋势线的方法相比,准确性有所提高.
- 在单次和多次损坏场景中,在高达4米/秒的速度下,可以准确地检测到损坏.
- 在损伤位置上观察到一些不准确的8m/s.
结论:
- 基于二次回归的趋势线方法提供了一个有前途的在线,快速和没有基线的方法来检测结构损坏.
- 该方法在各种条件下在识别损害方面表现出强大.
- 可能需要进一步的研究来优化更高速度的性能.
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