VIBRATION DISPLACEMENT SUPPRESSING STRUCTURE OF ELEVATED RIGID-FRAME BRIDGE

摘要

PROBLEM TO BE SOLVED: To realize the vibration displacement suppressing structure of an elevated rigid-frame bridge that can suppress vibration displacement of the elevated rigid-frame bridge caused by an earthquake motion, etc.;SOLUTION: The vibration displacement structure 100 of an elevated rigid-frame bridge can suppress vibration displacement of a column 4 of an elevated rigid-frame bridge R when, for example, a swing caused by an earthquake motion operates on the column 4 of the elevated rigid-frame bridge R, because the amplitude difference and phase difference between adjoining columns 4 are reduced due to transmission of vibration by a rigid body 20 arranged to extend along an underground beam 3 connected to the column 4 of the elevated rigid-frame bridge R, so that vibration of the columns 4 is not amplified but is attenuated. If vibration displacement of the column 4 of the elevated rigid-frame bridge R can be suppressed in this way, a slab girder 5 supported by the column 4 is less influenced by the earthquake motion, so that uneven displacement may be less likely to occur in the slab girder 5 and the number of troubles in the slab girder 5 caused by the earthquake motion may be decreased.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT