Mode Identification of High-Rise Reinforced Concrete Structures Based on Ambient Vibration Test

详细信息   

• 责任者：Wen Ruizhi (Institute of Engineering Mechanics ; CEA ; Harbin 150080 ; China) ; Hu Jinjun
• 刊名：Journal of Seismological Research
• 出版年：2008
• 卷期：31(3)
• 关键词：震灾 ; seismic hazard ; 数学模型 ; mathematical models
• 页码：p.289-295
• 图表：5 tables, 17 refs.
• 分类号：0500
• issnNo：ISSN1000-0666
• isbnNo：CN53-1062/P

摘要

///Based on the ambient vibration tests of high-rise reinforced concrete structures, the test data are performed in frequency domain and the natural frequencies of the buildings are determined. Then the mode shapes of the high-rise buildings are determined based on the mode amplitudes by cross-correlation function between two different observation points. Finally, the damping ratios of each mode are calculated using half-power method based on auto-power spectrum and cross-power spectrum. The results indicate that the 1st-3rd mode shapes can be obtained from the ambient vibration tests.