Vision-based digital shadowing is a highly efficient way to monitor the health of buildings in use. However, previous studies on digital shadowing have been limited to laboratory experiments. This paper proposes a novel computer-vision-based digital shadow workflow and presents its successful application in a real engineering case. In this case, a 345.8-m supertall building experienced unexpected shaking under normal meteorological conditions. This study established a digital shadow of the building using three-dimensional displacement measurements based on super-resolution monocular vision, revealing the hidden structural dynamics and inherent mechanical reasons for the abnormal shaking. The proposed digital shadowing workflow is a feasible roadmap for developing vision-based digital shadows of real-world structures using low-cost cameras. The abnormal vibration event in the supertall building considered in this study is the first of its type worldwide. The results of this study offer practical strategies and invaluable insights into the prevention and mitigation of this type of global risk, thereby contributing to the lifespan extension of buildings in use worldwide. Furthermore, with the increasing number of general sensing devices, such as surveillance cameras in cities, the proposed method may unleash the immense potential of general sensing devices in achieving the leap from structural health monitoring to city health monitoring.

中文翻译：

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基于视觉的数字阴影，揭示真实超高层建筑的隐藏结构动态


基于视觉的数字阴影是监控使用中建筑物健康状况的一种高效方法。然而，以前关于数字阴影的研究仅限于实验室实验。该文提出了一种新颖的基于计算机视觉的数字影子工作流程，并介绍了其在实际工程案例中的成功应用。在这种情况下，一栋 345.8 米的超高层建筑在正常气象条件下经历了意外的震动。本研究利用基于超分辨单目视觉的三维位移测量建立了建筑物的数字阴影，揭示了异常晃动的隐藏结构动力学和内在力学原因。提出的数字阴影工作流程是使用低成本相机开发基于视觉的真实世界结构数字阴影的可行路线图。本研究中考虑的超高层建筑中的异常振动事件是全球范围内同类事件中的首例。这项研究的结果为预防和减轻此类全球风险提供了实用策略和宝贵的见解，从而有助于延长全球使用建筑物的使用寿命。此外，随着城市监控摄像头等通用传感设备数量的增加，所提出的方法可能释放通用传感设备的巨大潜力，实现从结构健康监测到城市健康监测的飞跃。