Bridge bearings - Import export

Elastomeric bearings reinforced internally with one or more steel plates, chemically bonded during vulcanisation are called laminatid elastomeric bearings. Elastomeric bearings permit a smooth and uniform transfer of loads from beams to substructure and also allow beam rotations at the point of support due to deflection of beam under loading. They further allow lateral and longitudinal movement of beams caused by thermal forces. Elastomeric bearings have no moving parts and thermal expansion and contractions are supported by shear capacity of elastomers. There is no sliding motion between bearing and beam or between bearing and abutment.

Elastomeric bearings we have defined so far are the basic types, which constant feature is the fact that they allow all-ways movements and rotation. However, movements can be limited in one or all ways, thus obtaining guided or fixed bearings, respectively. In the first case -guided bearings- the restriction is obtained by means of guides parallel to the supporting axe that allows movement. To make friction as low as possible, PTFE and stainless steel sheets are welded to the guides.

If, on the contrary, a fixed bearing is desired, guides are added parallel to both axes, so that movement is completely blocked. Each elemental layer, subject to stresses and movements, deflects

This expansion joint is suitable to absorb longitudinal and transverse displacements of the decks with span up to 25 metres and covering gaps of up to 50 mm. It consists of: • anchoring system consisting of steel anchor clamps (anchor rods) of suitable dimensions and section; • CNR 10018/85-compliant reinforced rubber elements, to be fixed to the slabs, consisting of central bridging plate and two steel bearing elements, subject to prior laying of epoxy resin bedding; • hypalon gutter, fixed to the two slab heads by epoxy plaster. POS. DESCRIPTION MATERIAL A Gap-covering plate Dielectric vulcanized rubber B M12 anchoring system C Gutter Hypalon D Pouring of modified bitumen E Epoxy plaster S Fip 180 F Restoring of base plane Fibre-reinforced cement mortar G Binder H Road surface

The structural bearings are restraining devices used in structures, bridges and buildings, in order to precisely convey loads and restrain set degrees of freedom of movement. The range of FIP INDUSTRIALE structural bearings includes: all the types made of steel all the types made of rubber In addition to traditional types, FIP INDUSTRIALE also makes special devices such as anti-lifting, load measuring bearings, bearings for incrementally launched bridges etc. TYPES: Pot bearings Reinforced elastomeric bearings Sferopol bearings Cylindrical hinge bearings Special bearings

SR series mechanical fuse restraint devices prevent relative movements between connected parts until reaching a force threshold. Upon exceeding such force, thanks to the break of a sacrificial element, they permit said movements. They are used to exclude the seismic protection system under operating conditions, allowing for free operation during design earthquake. Experimental force-displacement curve of a mechanical fuse restraint device. SR devices coupled with a bearing (Krka Bridge, Croatia). A device of the SR series installed together with fluid viscous dampers in Rion Antirion Bridge (Greece).