Experimental investigation on the vortex-induced vibration characteristics of long-span twin continuous steel box girder bridge
Bo Wang , Fuyou Xu , Mingjie Zhang , Miaomin Wang
Advances in Bridge Engineering ›› 2026, Vol. 7 ›› Issue (1) : 18
The vortex-induced vibration (VIV) characteristics of a long-span twin continuous steel box girder bridge under varying wind angles of attack (αm), Scruton numbers (Sc), heights of beam (D = 0.078 m, 0.108 m, and 0.137 m) and layout forms (twin, single, and twin-girder fixed) are comprehensively investigated by sectional model wind tunnel tests with a scale ratio of 1:40. Results indicate that the VIV response of twin-box bridge is highly complex and shows no clear trend with changes in D or αm. Specifically, the D = 0.078 m model achieves the strongest VIV at αₘ = 5° with the downstream girder having significantly higher maximum dimensionless amplitude (Aₘₐₓ/D) than the upstream one; the D = 0.108 m and D = 0.137 m models reach maximum vibration at αₘ = -5°, where the downstream girder has higher amplitude except for a slight upstream advantage in the D=0.108 m model. The phase difference between upstream and downstream bridge is minimal at the onset of the lock-in region, increases toward approximately 180° as wind speed rises, then gradually decreases. Increasing Sc leads to reduced Amax/D. Under different layout forms, the largest Amax/D occur in the twin, single and twin-girder fixed models at αm = +3°, 0° and –3°, respectively
Girder sectional model / Long-span twin continuous girder bridge / Vortex-induced vibration / Wind angles of attack / Height of beam / Scruton number / Layout form
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
The Author(s)
/
| 〈 |
|
〉 |