This system is mainly used for roofs, footbridges or bridges subject to earthquakes, to resist occasional or permanent vertical uplift of the superstructure.
It consists of lateral restraint guides or a central rod depending on the forces applied, the space available and the type of support.
It requires anchoring to the structure.
This system is used to limit seismic forces on structures. It blocks the movement of the bearing up to a given load and then releases it when that load is exceeded.
The bearing is fixed with specially designed shear screws.
The system can be used to raise the superstructure by acting directly on the bearing when the superstructure support is at risk of subsidence (instable soil for example).
For pot bearings, a paste or resin is injected into the pot under the elastomer disc.
For elastomeric bearings, a flat jack is positioned under the elastomeric block.
This equipment, installed around the bearing to protect the sliding surfaces from dirt, is particularly useful in areas prone to sandstorms or for bearings that may be temporarily submerged.
The position of the sliding plates in sliding bearings can be adjusted to allow for irreversible movements such as shrinkage and creep. This option allows the dimensions of the sliding plates to be reduced.
This bearing blocks the translational movement of a sliding bearing during the construction phase.
The system is made up of lateral stops or adjustable wedges fastened underneath the sliding plate.
This bearing is designed to be used initially as a sliding chair during the incremental launching or sliding of a bridge deck, and then as a permanent bearing during the service life of the structure. The bearing can rotat during the launch phase, allowing full contact between the sliding pads and the underside of the deck.
The bearing is temporarily fixed by screws and stops that block the movement.
It allows the operator installing the bearings to ensure that they are perfectly horizontal.
It can be mounted on all types of bearings.
The system can be used to raise the superstructure by acting directly on the bearing when the superstructure support is at risk of subsidence (instable soil for example).
For pot bearings, a paste or resin is injected into the pot under the elastomer disc.
For elastomeric bearings, a flat jack is positioned under the elastomeric block.
In order to monitor the behaviour of the structure over time, pot bearings can be equipped with a vertical load measurement system.
The readings are taken directly on the bearing, or remotely via a wire or radio connection.
It allows easy control of the horizontality of the bearing sliding surface during installation and the life of the structure.
It can be mounted on all types of bearings.
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