BRIDGE-FALL PREVENTION DEVICE WITH DISPLACEMENT ADJUSTING FUNCTION

PROBLEM TO BE SOLVED: To provide a bridge-fall prevention device with a displace adjusting function compactly installed with a bridge-fall prevention device and a displacement restricting device in one device. SOLUTION: In the bridge-fall prevention device, a locking protrusion 2 is provided on either one of an upper stopper member 3 or a lower stopper member 1, and a locking recessed portion 4 is provided on the other. The locking protrusion 2 is disposed in the locking recessed portion 4, and the upper stopper member 3 and the lower stopper member 1 are respectively attached to a superstructure 22 and a lower structure 23. On either one of a lower surface of the lower stopper member 1 or an upper surface of the upper stopper member 3, an elastic layer 5 resisting by shearing deformation in a bridge axial direction is integrally adhered. A base plate 6 is adhered to the lower surface of the elastic layer 5, and a displacement adjusting gap in the bridge axial direction for shearing deforming the elastic layer 5 is provided between a bolt insertion hole of the lower stopper member 1 and an anchor bolt 8 attaching the lower stopper member 1 to the lower structure 23. COPYRIGHT: (C)2008,JPO&INPIT