Table 5 Modal properties
From: Response of Aswan cable-stayed bridge to spatial non-synchronous seismic excitations
Mode no. | Period (sec) | Modal participating mass ratios (%) | Description | |||||
|---|---|---|---|---|---|---|---|---|
Longitudinal direction | Longitudinal direction (cumulative) | Lateral direction | Lateral direction (cumulative) | Vertical direction | Vertical direction (cumulative) | |||
1 | 11.86 | 0 | 0 | 42.73 | 42.73 | 0 | 0 | Out of plane bending of pylons (first mode—in phase) |
2 | 11.62 | 0 | 0 | 0 | 42.73 | 0 | 0 | Out of plane bending of pylons (first mode—out of phase) |
3 | 6.14 | 89.52 | 89.52 | 0 | 42.73 | 0 | 0 | Longitudinal vibration through seismic isolation interface |
4 | 5.34 | 0 | 89.52 | 0 | 42.73 | 0 | 0 | transverse vibration through seismic isolation interface (out of phase) |
5 | 5.12 | 0 | 89.52 | 8.44 | 51.17 | 0 | 0 | Transverse bending of deck (first mode) |
6 | 4.72 | 0 | 89.52 | 38.19 | 89.36 | 0 | 0 | Transverse vibration through seismic isolation interface (in phase) |
7 | 1.69 | 0 | 89.52 | 0 | 89.36 | 0 | 0 | Transverse bending of deck (second mode) accompanied with transverse vibration through seismic isolation interface (out of phase) |
8 | 1.65 | 0 | 89.52 | 0 | 89.36 | 27.2 | 27.2 | Vertical bending of main span deck (first mode) |
9 | 1.18 | 0 | 89.52 | 0.03 | 89.39 | 0 | 27.2 | Out of plane bending of pylons (second mode—in phase) |
10 | 1.1 | 0 | 89.53 | 0 | 89.39 | 0 | 27.2 | Vertical bending of main span deck (second mode) |