Dynamic performance verification of the Redzinski Bridge using portable camera-based vibration monitoring systems
Dynamic performance verification of the Redzinski Bridge using portable camera-based vibration monitoring systems
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DOI：
10.1007/s43452-022-00582-7
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发表时间：
2022-12-02
影响因子：
4.4
通讯作者：
Biliszczuk, Jan
中科院分区：
文献类型：
--
作者：
Bocian, Mateusz;Nikitas, Nikolaos;Biliszczuk, Jan
大型桥梁动态性能的评估通常依赖于有线仪器系统的部署，需要与测试结构直接接触。这可能会阻碍其运行，并对相关人员和设备造成不必要的风险。这些问题可以通过使用非接触式仪表系统来容易地避免。然而，现成的商业产品的成本往往阻止其在工程实践中的广泛采用。为此，最大的独塔斜拉桥在波兰的动力性能进行了研究的基础上，从消费级数码相机和开放式图像处理算法的数据。这些数据的质量是基准对从传统的有线加速度计和高端商业光学运动捕捉系统获得的数据。操作模态分析进行提取模态阻尼，这有可能作为一个指标的结构健康。桥梁的动态特性进行评估，对在桥梁开放前进行验证加载演习期间获得的结果。结果表明，基于消费级数码相机的振动监测系统确实可以提供一个经济可行的替代监测复杂的时间演变的动态行为模式的大型桥梁。
The assessment of dynamic performance of large-scale bridges typically relies on the deployment of wired instrumentation systems requiring direct contact with the tested structures. This can obstruct their operation and create unnecessary risks to the involved personnel and equipment. These problems can be readily avoided by using non-contact instrumentation systems. However, the cost of off-the-shelf commercial products often prevents their wide adoption in engineering practice. To this end, the dynamic performance of the biggest one-pylon cable-stayed bridge in Poland is investigated based on data from a consumer-grade digital camera and open access image-processing algorithms. The quality of these data is benchmarked against data obtained from conventional wired accelerometers and a high-end commercial optical motion capture system. Operational modal analysis is conducted to extract modal damping, which has a potential to serve as an indicator of structural health. The dynamic properties of the bridge are evaluated against the results obtained during a proof loading exercise undertaken prior to the bridge opening. It is shown that a vibration monitoring system based on consumer-grade digital camera can indeed provide an economically viable alternative to monitoring the complex time-evolving dynamic behaviour patterns of large-scale bridges.