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Modal Identification of Civil Structures via Stochastic Subspace Algorithm with Monte Carlo-Based Stabilization Diagram
| 题名： | Modal Identification of Civil Structures via Stochastic Subspace Algorithm with Monte Carlo-Based Stabilization Diagram |
| 正文语种： | eng |
| 作者： | Zho, Kang;Li, Qiu-Sheng;Han, Xu-Liang |
| 作者单位： | City Univ Hong Kong Dept Architecture & Civil Engn Kowloon Hong Kong Peoples R China;City Univ Hong Kong Dept Architecture & Civil Engn Kowloon Hong Kong Peoples R China|City Univ Hong Kong Architecture & Civil Engn Res Ctr Shenzhen Res Inst Shenzhen 518057 Peoples R China;City Univ Hong Kong Dept Architecture & Civil Engn Kowloon Hong Kong Peoples R China |
| 关键词： | Stochastic subspace identification;Modal identification;Modal parameters;Monte Carlo-based stabilization diagram;Civil structures;High-rise building |
| 摘要： | The stochastic subspace algorithm is one of the most widely used structural identification techniques, which is generally involved with the stabilization diagram for estimating modal parameters. However, the conventional stabilization diagram has an inherent problem: some spurious modes may be identified as stable results, resulting in adverse effects on structural modal identification. To address this critical issue, this paper proposes an improved stochastic subspace algorithm involving a Monte Carlo-based stabilization diagram. Through a numerical simulation study, the good performance of the Monte Carlo-based stabilization diagram for discriminating the poles denoting the physical modes from those representing spurious modes is demonstrated. The numerical simulation results show that the proposed method can estimate structural modal parameters with high accuracy and robustness. Moreover, the proposed method is applied to field measurements on a 600-m-high skyscraper during Super Typhoon Mangkhut, and the results verify the applicability and effectiveness of the proposed method to field measurements. This paper aims to provide an effective tool for accurate estimation of modal parameters of civil structures. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 6 |
| 页码： | 04022066.1-04022066.13 |
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