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High damping rubber bearings
LASTO-HDRB
Seismic devices
Characteristics
For seismic isolation of structures
Acts as regular bearing but allows large sudden movements
Special rubber used provides damping (up to 20%) and energy dissipation
Principle
mageba LASTO-HDRB High Damping 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 the elastomer material used has a special composition that dissipates seismic energy by deformation and heat generation.
Applications
LASTO-HDRB High Damping 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-HDRB bearing
A LASTO-HDRB bearing prior to installation
Installed LASTO-HDRB bearing
Martigny Bridge, Switzerland - retrofitted with LASTO-HDRB bearings
