Abstract
Structural damping ratio for the first mode of a bridge is estimated to figure out the main source of a vortex-induced vibration (VIV) observed in a parallel twin cable-stayed bridge. Through a series of wind tunnel test, the damping ratio of the bridge seems to be lower than the design value. The damping ratio has been estimated by couple of approaches such as output-only system identification method and TMD-induced forced excitation. Estimated damping ratio varies between 0.20∼0.60% for an average of 0.28%. This range of damping ratio shows a good agreement with predicted values in wind tunnel tests for the observed vibration in the field. In conclusion, a low structural damping ratio for the first mode has been identified as a source of large VIV for the investigated bridge.
| Original language | English |
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| State | Published - 2013 |
| Event | 6th European and African Conference on Wind Engineering, EACWE 2013 - Cambridge, United Kingdom Duration: 7 Jul 2013 → 13 Jul 2013 |
Conference
| Conference | 6th European and African Conference on Wind Engineering, EACWE 2013 |
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| Country/Territory | United Kingdom |
| City | Cambridge |
| Period | 7/07/13 → 13/07/13 |
