The Isosism HDRB isolators consist of alternate
layers of rubber and vulcanised reinforcement steel plates of limited thickness.
They allow isolation of the structure by a proper selection of the horizontal
stiffness and they can dissipate energy up to 16% damping due to high damping
rubber compound.
The Isosism HDRB fulfil the following requirements:
- Transmit the vertical loads due to permanent and accidental effects;
- Capacity to support horizontal loads due to service load conditions with very low displacements
- Capacity
of isolate the structure by shifting the fundamental vibration period to
an optimal and safe level
Capacity to dissipate energy to reduce the horizontal displacement of the
isolated structure with respect to the ground
HDRB isolators have the following advantages:
- No damage to the structure that remains in the elastic response due to high intensity earthquakes with no interruption of the structural function. This is a primary goal for strategic structures (hospitals, control rooms, ecc…)
- Very well known and used in many applications both for buildings and bridges
Very simple maintenance mainly limited to
a periodic visual inspection for all the design life
- Capacity to reduce the seismic energy from the ground to the structure
with consequent simplification of the structure design