Damage-controlled bearing structures

Abstract

The article of the present design, as shown in the reference drawing showing the state of use, is a bearing damage control structure that is attached to a bearing (bearing plate bearing) that is installed between a bridge girder (main structure) and an abutment (supporting structure) that supports the bridge girder and that suppresses relative displacement that occurs between the bridge girder and the abutment, reinforcing the bearing. The bearing damage control structure is pulled radially inward by a pair of drawing bolts, and is tightly fixed to the stopper flanges of the upper shoe and the convex and peripheral portions of the lower shoe, while abutting against and holding the stopper flanges that extend radially from both sides of the upper shoe of the bearing, abutting against and holding the convex portions that extend upward from both sides of the lower shoe of the bearing, and abutting against and holding the peripheral portion that extends around the lower shoe. Bearing damage control structures reinforce existing bearings (bearing plate bearings) without interfering with the bearing's vertical support function, rotation function, or displacement tracking function, and prevent the bearing from being damaged by external forces even if a large relative displacement occurs between the bridge girder (main structure) and the abutment (supporting structure) due to earthquake shaking and the external forces caused by the relative displacement are transmitted to the upper and lower shoes of the bearing.

Images