Lock-up Bearing

Product Introduction

The Lock-up Bearing is a composite bridge bearing that integrates the load-bearing function of a conventional bearing with a speed locking device. Under normal displacement speeds, it maintains flexible displacement characteristics. When subjected to higher speeds caused by braking forces, wind loads, or seismic loads, the speed locking mechanism activates (locks up). This transforms the structural system from having a single fixed pier under normal conditions to multiple fixed piers, effectively distributing the load from the superstructure across several piers to resist damage to the bridge from earthquakes and other disasters.

Its core operating principle involves incorporating a speed locking device on the bearing. Under daily temperature variations and wind effects, the bearing can freely accommodate thermal deformation and normal live load displacements. When the displacement velocity reaches a preset threshold, the locking device activates immediately, causing the bearing to function equivalently to a fixed bearing, sharing horizontal forces together with the fixed pier.