General Information

Product description

In order to lock movement and introduce loads parallel to the bearing surface, they are equipped with additional steel structures referred to as support structures. The use of support structures allows the transfer of greater horizontal loads than those stemming from the properties of rubber and the bearing internal structure.
Anti-corrosion protection of GUMBA elastomer bearing steel structures conforms to requirements of Polish Standard PN-EN 1337-9. As standard, the protection system no. 1 provided in the German Supplementary Technical Contractual Conditions and Guidelines for Engineering Structures (Germ. Zusätzliche Technische Vertragsbedingungen und Richtlinien für Ingenieurbauten, ZTV-ING).
It is composed of

  • a zinc coat introduced through metalisation onto a surface cleaned to Sa3 standard, 100 μm thickness
  • a primer layer, 80 μm
  • a top layer, 80 μm

The above indicated layers are ordered according to the order of their application onto the metal surface. The corrosion protection system used is, as may be inferred from our long years of experienced, the most efficient. If there is no mechanical damage to the top surface, it guarantees maintenance of the steel bearing structure in very good shape over a few decades at least. Other corrosion protection coats are available on demand.
Elastomer bearing support structures are categorised by the bearing mode of action and locking the slide direction.

V2 structure - multi-directional moving elastomer bearing, 1.1.  
V1x structure - single direction-moving cross-fixed elastomer bearing, 1.2.  
V1y structure - single direction-moving lengthwise-fixed elastomer bearing, 1.2.  
V structure - fixed non-moving elastomer bearing, 1.6.  

Depending on the individual requirements, the support structure is adapted to the site's needs. The bearings are anchored depending on the material type, of which the structure is made - be it steel or reinforced concrete.

 

Example joints/installation modes for bearing structures to structure components

Concrete/concrete
Steel/concrete
Steel/steel

 

Examples of elastomer bearings in conjunction with support structures

These components are used in structures, within which the drive-on part of the bridge is made of concrete. The lower anchors are installed in the lower plinth, and the upper anchors are mounted in the crossmember or the concrete drive-on part of the structure.

A type 1.1 multi-directionally moving elastomer bearing, including its support structure, anchored on both sides in concrete. A type 1.2 single direction-moving cross-fixed elastomer bearing, including its support structure, anchored on both sides in concrete.

A type 1.2 single direction-moving lengthwise-fixed elastomer bearing, including its support structure, anchored on both sides in concrete. A type 1.6 fixed non-moving elastomer bearing, including its support structure, anchored on both sides in concrete.

These components may be used in structures, in which the drive-on surface of the bridge is made of steel. This is indicated by the openings for attachment of the bearings to the steel structure, located in the top sheet steel elements of the support structure. In order to join the steel structure of the bearing with the steel structure of the object, joining components per Polish Standard PN-EN 14399 need to be used. The lower anchors are mounted in the lower plinth.

A type 1.1 multi-directionally moving elastomer bearing, including its support structure. The top bearing plane is adapted for anchoring in the steel structure of a bridge. A type 1.2 single direction-moving cross-fixed elastomer bearing. The top bearing plane is adapted for anchoring in the steel structure of a bridge.

A type 1.2 single direction-moving lengthwise-fixed elastomer bearing. The top bearing plane is adapted for anchoring in the steel structure of a bridge. A type 1.6 fixed non-moving elastomer bearing. The top bearing plane is adapted for anchoring in the steel structure of a bridge.

Note:
Dimensions and spacings of anchors of the bearing steel support structure can be adapted to the needs of engineering structures.