Video Tracking of Targets for Vibration Measurement of Large-Scale Structures Under Seismic Excitation

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Earthquake Engineering & Structural Dynamics Pub Date : 2025-04-08 DOI:10.1002/eqe.4353

Stefania Lo Feudo, Yunhyeok Han, Gwendal Cumunel, Ryan Hoult, Alex Bertholet, Denis Garnier, Paulo Candeias, António A. Correia, João Pacheco de Almeida

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引用次数: 0

Abstract

Development of video-based vibration techniques and reliability of displacement measurements have important implications in several areas, including structural testing and monitoring of large structures. Through the use of numerous targets placed on the structure, 3-dimensional (3D) analysis, and modal identification can be performed with minimal installation costs, no mass increase, and contactlessly. This study applies and validates video tracking of targets for vibration analysis of a large-scale structure, namely, a reinforced concrete U-shaped wall, tested experimentally under seismic excitation on a shake table. 2D grids of targets are placed on two orthogonal surfaces and filmed by several cameras. Values obtained from a motion capture system, digital image correlation, and traditional displacement sensors are compared. Results confirm that the 3D motion of the U-shaped wall surfaces and foundation can be accurately extracted from video analysis.

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地震激励下大型结构振动测量目标的视频跟踪

基于视频的振动技术的发展和位移测量的可靠性在几个领域具有重要意义，包括结构测试和大型结构的监测。通过使用放置在结构上的众多目标，可以以最小的安装成本、不增加质量和无接触的方式进行三维（3D）分析和模态识别。本研究将目标的视频跟踪应用于大型结构的振动分析，即在振动台上进行地震激励试验的钢筋混凝土u型墙。目标的二维网格放置在两个正交的表面上，由几个摄像机拍摄。从运动捕捉系统、数字图像相关和传统位移传感器获得的值进行了比较。结果表明，通过视频分析可以准确地提取u型墙体和地基的三维运动。

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来源期刊

Earthquake Engineering & Structural Dynamics 工程技术-工程：地质

CiteScore

7.20

自引率

13.30%

发文量

180

审稿时长

4.8 months

期刊介绍： Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.