| Title | Dynamic characteristics of Canada's Parliament Hill towers from ambient vibrations and recorded earthquake data |
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| Author | Kolaj, M; Adams, J |
| Source | Canadian Journal of Civil Engineering vol. 48, issue 1, 2020 p. 16-25, https://doi.org/10.1139/cjce-2018-0474 |
| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20180093 |
| Publisher | Canadian Science Publishing |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | Ontario |
| NTS | 31G/05 |
| Area | Ottawa |
| Lat/Long WENS | -76.0000 -75.5000 45.5000 45.2500 |
| Subjects | Science and Technology; earthquakes |
| Illustrations | photographs; diagrams; tables; graphs |
| Program | Canadian Hazard Information Service |
| Released | 2020 12 11 |
| Abstract | The dynamic properties of Parliament Hill's buildings (Ottawa, Canada) are of particular interest due to their important heritage value and because of the seismic retrofit project currently underway. To
measure the dynamic properties directly, ambient vibration data were collected within the Peace Tower of Centre Block and the South-West Tower of East Block and processed together with weak to strong ground motions from six earthquakes. Both datasets
found the fundamental mode to be 1.0-1.15 Hz for the Peace Tower and 2 Hz for the South-West Tower. The 2010 magnitude 5 Val-des-Bois earthquake induced peak accelerations of 49% g and 18% g in the top floors of the Peace and South-West towers,
respectively, triggering a nonlinear response, causing the frequencies of the dominant modes to be reduced by 10%-15%. The reduction in frequency was temporary and the frequencies returned to baseline values, suggesting that there was no permanent
structural damage. |
| Summary | (Plain Language Summary, not published)
To mitigate seismic risk it is important to obtain a structure¿s dynamic characteristics. Earthquake and ambient noise data recorded within the
South-West and Peace Towers of Parliament Hill were processed to determine the Towers dynamic structural properties to varying amplitudes of input motions. These experimentally derived properties provide a useful dataset for validating computational
models. |
| GEOSCAN ID | 308319 |
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