Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data
In recent decades, China has collected extensive strong-motion data from the Loess Plateau, which is valuable for understanding the dynamic characteristics of loess sites and the effects of site conditions on seismic motions. The horizontal-to-vertical Fourier spectrum ratio (HVSR) and the horizonta...
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MDPI AG
2024-12-01
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| author | Qi Li Jingshan Bo Da Peng |
| author_facet | Qi Li Jingshan Bo Da Peng |
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| description | In recent decades, China has collected extensive strong-motion data from the Loess Plateau, which is valuable for understanding the dynamic characteristics of loess sites and the effects of site conditions on seismic motions. The horizontal-to-vertical Fourier spectrum ratio (HVSR) and the horizontal-to-vertical velocity response spectrum ratio (VRSR) are widely used to study site dynamics. This study analyzes strong-motion data from the Loess Plateau to identify key features of the HVSR and VRSR curves. The results show that these spectral ratio curves effectively capture the dynamic behaviors of loess sites, minimizing the influences of earthquake magnitude and propagation path. While the spectral ratio peaks are less affected by magnitude, epicentral distance, and focal depth, they are significantly influenced by site conditions. Conversely, the dominant periods estimated from these curves are strongly influenced by magnitude, epicentral distance, and focal depth. For sites located on the Loess Plateau, the average amplification factor is approximately 3, with a mean predominant period of 0.4 s. These results provide valuable insights into the dynamic characteristics of loess sites and have practical implications for seismic design in the region. |
| format | Article |
| id | doaj-art-c84c6956c7f7479eb8c8d2e79a0dc713 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-c84c6956c7f7479eb8c8d2e79a0dc7132025-01-10T13:14:20ZengMDPI AGApplied Sciences2076-34172024-12-011516710.3390/app15010067Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion DataQi Li0Jingshan Bo1Da Peng2Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaCollege of Geological Engineering, Institute of Disaster Prevention, Langfang 065201, ChinaIn recent decades, China has collected extensive strong-motion data from the Loess Plateau, which is valuable for understanding the dynamic characteristics of loess sites and the effects of site conditions on seismic motions. The horizontal-to-vertical Fourier spectrum ratio (HVSR) and the horizontal-to-vertical velocity response spectrum ratio (VRSR) are widely used to study site dynamics. This study analyzes strong-motion data from the Loess Plateau to identify key features of the HVSR and VRSR curves. The results show that these spectral ratio curves effectively capture the dynamic behaviors of loess sites, minimizing the influences of earthquake magnitude and propagation path. While the spectral ratio peaks are less affected by magnitude, epicentral distance, and focal depth, they are significantly influenced by site conditions. Conversely, the dominant periods estimated from these curves are strongly influenced by magnitude, epicentral distance, and focal depth. For sites located on the Loess Plateau, the average amplification factor is approximately 3, with a mean predominant period of 0.4 s. These results provide valuable insights into the dynamic characteristics of loess sites and have practical implications for seismic design in the region.https://www.mdpi.com/2076-3417/15/1/67loess plateaustrong ground motion dataHVSRVRSRamplification factorsuperior period |
| spellingShingle | Qi Li Jingshan Bo Da Peng Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data Applied Sciences loess plateau strong ground motion data HVSR VRSR amplification factor superior period |
| title | Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data |
| title_full | Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data |
| title_fullStr | Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data |
| title_full_unstemmed | Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data |
| title_short | Characterization of HVSR and VRSR in the Loess Plateau of China Based on Strong-Motion Data |
| title_sort | characterization of hvsr and vrsr in the loess plateau of china based on strong motion data |
| topic | loess plateau strong ground motion data HVSR VRSR amplification factor superior period |
| url | https://www.mdpi.com/2076-3417/15/1/67 |
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