| 摘要 |
PROBLEM TO BE SOLVED: To provide a deck type suspended floor board bridge having a large overall rigidity and being excellent in deflection and vibration characteristics. SOLUTION: This bridge has a suspended floor board 2 where a thin concrete member with axial steel placed thereon is suspended between two abutments 1a, 1b, a plurality of columns 3 erected thereon, and a deck girder 4 supported on the columns. Stays 5 connecting the portions of the columns near their tops diagonally to the suspended floor board are provided. The stays are steel pipes or concrete-filled FRP members, etc., and are arranged in symmetry with respect to the center of the span. The stays are mounted after construction of the suspended floor board, the columns and the deck girder is complete, and are almost unstressed when no fluctuating loads such as active loads are applied. The stays do not need to connect to the suspended floor board all of the columns erected on the suspended floor board, and the number of the stays and their positions can be selected appropriately. The deck girder may be connected to the abutments via elastic members. |
