基于同步提取变换的地震引起的结构破坏识别

IF 2.6 2区 工程技术 Q2 ENGINEERING, CIVIL Earthquake Engineering and Engineering Vibration Pub Date : 2024-04-19 DOI:10.1007/s11803-024-2249-5
Kumar Roshan, Kumar Gaurav, Zhao Wei, Arvind R. Yadav, Yu Gang, Jayendra Kumar, Evans Amponsah
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引用次数: 0

摘要

研究了几种常用的时频技术,包括 Wigner-Ville 分布、平滑伪 Wigner-Ville 分布、小波变换、同步抽取变换、Hilbert-Huang 变换和 Gabor-Wigner 变换,以确定它们识别结构损坏的能力。本研究提出了一种基于短时傅立叶变换的同步提取变换(SET),用于估算震后结构损伤。与现有方法相比,SET 对人工生成的信号和实际地震信号的性能进行了检验。在其他测试技术中,SET 通过降低沿时间-频率平面的涂抹影响,在很大程度上提高了频率分辨率。因此,所建议方法的解释性和可读性都得到了改善,而且通过 SET 方法可以轻松检测到受损建筑物时变频率特性的微小变化。
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Identification of earthquake induced structural damage based on synchroextracting transform

Several popular time-frequency techniques, including the Wigner-Ville distribution, smoothed pseudo-Wigner-Ville distribution, wavelet transform, synchrosqueezing transform, Hilbert-Huang transform, and Gabor-Wigner transform, are investigated to determine how well they can identify damage to structures. In this work, a synchroextracting transform (SET) based on the short-time Fourier transform is proposed for estimating post-earthquake structural damage. The performance of SET for artificially generated signals and actual earthquake signals is examined with existing methods. Amongst other tested techniques, SET improves frequency resolution to a great extent by lowering the influence of smearing along the time-frequency plane. Hence, interpretation and readability with the proposed method are improved, and small changes in the time-varying frequency characteristics of the damaged buildings are easily detected through the SET method.

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来源期刊
CiteScore
4.70
自引率
21.40%
发文量
1057
审稿时长
9 months
期刊介绍: Earthquake Engineering and Engineering Vibration is an international journal sponsored by the Institute of Engineering Mechanics (IEM), China Earthquake Administration in cooperation with the Multidisciplinary Center for Earthquake Engineering Research (MCEER), and State University of New York at Buffalo. It promotes scientific exchange between Chinese and foreign scientists and engineers, to improve the theory and practice of earthquake hazards mitigation, preparedness, and recovery. The journal focuses on earthquake engineering in all aspects, including seismology, tsunamis, ground motion characteristics, soil and foundation dynamics, wave propagation, probabilistic and deterministic methods of dynamic analysis, behavior of structures, and methods for earthquake resistant design and retrofit of structures that are germane to practicing engineers. It includes seismic code requirements, as well as supplemental energy dissipation, base isolation, and structural control.
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