Table 3 Statistics of dispersion indexes of identified modal damping ratios of PSRB and XB
From: Identification of modal parameters of long-span bridges under various wind velocities
Bridge | Mode order | Identification method | |||||
|---|---|---|---|---|---|---|---|
SSI-COV | EWT-HT | ||||||
\(\sigma\) | cv | R | \(\sigma\) | cv | R | ||
PSRB | 1 | 0.400 | 0.466 | 1.947 | 0.264 | 0.353 | 1.155 |
2 | 0.897 | 0.676 | 4.297 | 0.511 | 0.373 | 2.018 | |
3 | 0.305 | 0.384 | 1.380 | 0.405 | 0.329 | 1.730 | |
XB | 1 | 0.671 | 0.579 | 3.064 | 0.656 | 0.450 | 2.629 |
2 | 0.620 | 0.694 | 2.720 | 0.373 | 0.515 | 1.418 | |
3 | 0.173 | 0.548 | 0.641 | 0.278 | 0.595 | 1.154 | |