A direct method to detect and localise damage using longitudinal data of ends-of-span rotations under live traffic loading
A direct method to detect and localise damage using longitudinal data of ends-of-span rotations under live traffic loading
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DOI：
10.1007/s13349-021-00533-5
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发表时间：
2021-11-06
影响因子：
4.4
通讯作者：
Woods, Roger
中科院分区：
文献类型：
--
作者：
Ferguson, Alan J.;Hester, David;Woods, Roger
现有的基于转角的桥梁监测工作主要集中在间接方法上，如桥梁动载称重法或影响线法。然而，这些方法需要增加仪器的复杂性，并且需要校准，因此有必要关闭桥梁。在这篇文章中，我们探索了使用旋转测量来创建更实用和更具成本效益的监测系统的潜力。为此，我们提出了一种损伤检测方法，该方法直接分析在实时、自由流交通荷载下测得的桥梁转角数据。我们展示了如何将通常用于统计和图像处理的地球推进器距离直接应用于跨度结束旋转测量数据，以实现有效的损伤检测和定位。数值模拟结果表明，该方法对温度变化和交通多样性(车辆类型、负载和速度)的混合影响具有较强的鲁棒性。将直接转角测量方法应用于在役短跨度桥梁的数据，以验证该技术在自由流交通荷载作用下的能力。
Existing work on rotation-based bridge monitoring has focused on indirect methods, such as bridge weigh-in-motion or influence line approaches. However, these approaches require increased instrumentation complexity, and require calibration, necessitating bridge closures. In this paper, we explore the potential of using rotation measurements to create a more practical and cost-effective monitoring system. To this end, we present a damage detection method which directly analyses bridge rotation data measured under live, free-flow traffic loading. We show how the Earth Mover's Distance, typically used in statistics and image processing, can be applied directly on end-of-span rotation measurement data to achieve effective damage detection and localisation. Numerical simulation results demonstrate the approach's robustness to the confounding effects of temperature variation and traffic diversity (vehicle type, loading, and velocity). The direct rotation measurement approach is applied to data from an in-service short-span bridge to demonstrate the technique's capability with free-flow traffic loading.