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Modal Identification of 38 Supertall Buildings and Establishment of Predictive Models
| 题名： | Modal Identification of 38 Supertall Buildings and Establishment of Predictive Models |
| 正文语种： | eng |
| 作者： | Kang Xu;Qiu-Sheng Li;Kang Zhou;Xu-Liang Han;Jun-Wen Wan |
| 作者单位： | Central South Univ.;City Univ. of Hong Kong;Hefei Univ. of Technology;City Univ. of Hong Kong;Central South Univ. |
| 关键词： | Supertall building;Predictive model;Modal identification;Natural frequency;Damping ratio;Field measurement |
| 摘要： | Abstract Information on natural frequencies and damping ratios is essential for structural dynamic analysis. To develop predictive models of modal parameters applicable for modern high-rise buildings with increasing heights, an advanced interferometric radar system was employed to measure the displacement responses of 38 supertall buildings with heights ranging from 200 to 600 m under ambient excitations. Then, a combined approach of the stochastic subspace method and an uncertainty bound estimation method are adopted for modal identification, and its accuracy is validated by a numerical simulation study. By applying the modal identification method to the field measurements, modal parameters of the 38 supertall buildings are identified. Based on these results, predictive models for fundamental natural frequency and damping ratio of supertall buildings are accordingly proposed, which are more applicable for the wind-resistant serviceability assessment or design of high-rise buildings with heights over 200 m than existing empirical models. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 4 |
| 页码： | 1-11 |
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