Headquarters:
mageba sa
Trafostrasse 1
8180 Bulach
Switzerland
Tel: +41-44-872 40 50
Fax:
Lead rubber bearings
LASTO-LRB
Seismic devices
Characteristics
For seismic isolation of structures
Acts as regular bearing but allows large sudden movements
Lead core deforms providing damping (up to 30%) and energy dissipation
Principle
mageba LASTO-LRB Lead Rubber Bearings isolate a structure from the movements of the ground during an earthquake and thus limit the seismic energy acting on the structure. They are similar to regular reinforced elastomeric bearings with steel connection plates, but feature a lead core. This core will undergo plastic deformation during an earthquake, generating heat and dissipating the seismic energy.
Applications
LASTO-LRB Lead Rubber Bearings can be used in the construction of new structures, or to enhance an existing structure’s strength and resistance to seismic forces. Under normal conditions, they function as regular deformation bearings, and are thus particularly suitable for structures with limited space availability, where the installation of separate bearings and seismic protection systems is not possible.
Schematic view (cutaway) of a LASTO-LRB bearing
LASTO-LRB bearing ready for installation
Testing of a LASTO-LRB bearing
Assembling of LASTO-LRB bearings
Viaduct de Chillon, Switzerland - retrofitted with LASTO-LRB bearings
