| 要旨 |
Xiaoyudong Bridge received great damage in Wenchuan EQ, 2008. Being a RC rigid-frame arch bridge, its dynamic behavior has not been sufficiently studied. In this paper, it is found that the girder near the joints with arch leg, and the bottom of inclined legs are crucial points. Besides, the 1st mode mainly dominates the horizontal vibration, while the 2nd mode mainly controls the vertical. However, different components have different effects on the axial force variation and the flexural vibration. Wolong wave provides most severe damage due to the strongest wave component in U-D direction. |