使用交通成像进行桥梁动态响应分析和负载识别方法
Liang Tang1, Xiao-Bei Liu2, Yi-Jun Liu3
1College of Civil Engineering, Chongqing Jiaotong University, Chongqing, China.
Scientific reports
|August 13, 2024
概括
这项研究引入了一种新的方法,用于使用交通监控视频识别桥梁车辆负载. 这种非接触式方法为监控中小型桥梁提供了成本效益高的解决方案,无需额外的硬件.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构健康监测 结构健康监测
- 计算机视觉 计算机视觉
背景情况:
- 车辆负载是监测桥梁健康状况的关键参数.
- 传统的移动权衡 (WIM) 系统和基于传感器的方法通常对中小型桥梁来说是不切实际的.
- 需要非接触式,具有成本效益的负载监控解决方案.
研究的目的:
- 通过使用交通监控视频数据,提出和验证一种用于识别桥梁车辆负载的新方法.
- 为了使桥梁结构响应的非接触测量.
- 为广泛的桥梁健康监测提供负载统计信息.
主要方法:
- 利用交通监控视频数据来检测目标点的子像素位移.
- 采用图像检测算法进行桥梁结构响应的非接触测量.
- 建立了一个时空关系模型,将结构位移,车辆负载和负载分布联系起来.
主要成果:
- 模型桥测试显示,与接触传感器 (LVDT) 相比,移位测量的偏差不到10%.
- 实地测试显示,重型车载 (12-18) 的平均估计偏差约为18%.
- 该方法准确地反映了结构位移特性,并符合工程要求.
结论:
- 提出的基于视频的方法是桥梁车辆负载识别的可行和有效方法.
- 它提供了一种新的技术途径,可以在没有额外的硬件的情况下获取桥梁负载信息.
- 这种方法特别适用于中小型桥梁的健康监测.
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