| 摘要 |
The present invention relates to an upper structure of a continuous bridge including at least two rows of girders placed on a lower structure of the bridge in the longitudinal direction; a vertical beam arranged on the upper side of a neutral axis between the girders in the longitudinal direction; normal horizontal beams fixating the vertical while connecting the girders in the transverse direction and arranged at intervals in the longitudinal direction of the composite girders; and wide horizontal beams having a width wider than the normal vertical beams, connecting at least two rows of connected portions in the transverse direction, and fixating the vertical beam. As the vertical beam is arranged on the upper side of the neutral axis between the girders, the multiple rows of the girders are moved like as one plate. And the wide horizontal beam suppresses the difference in axial displacement generated by the difference in the of the composite girder, which is the main girder, and the vertical beam at the same time, and thereby out-of-plane bending moment generated on the normal horizontal beam (77) can be reduced. Therefore, the present invention provides the continuous bridge capable of economically solving a problem that the safety of the multiple normal horizontal beams, which are formed to be thinner than the minimum numbers of wide horizontal beams, deteriorates. |
