ISOSISM® isolation systems
The structure isolated from the movement of the ground using ISOSISM® isolation systems increases its fundamental period of vibration and reduces the response to seismic acceleration.
The effectiveness of the isolators is directly related to the horizontal stiffness and results in a significant displacement of the structure under seismic conditions. The effects of structural isolation therefore result in a low natural frequency, low acceleration, reduced horizontal forces in the structure and increased relative displacement.
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1,000+Number of projects worldwide
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25,000+Number of units installed worldwide
Benefits
01. Prevention of structural damage
No damage to the structure which remains in the elastic response triggered by high intensity earthquakes without disrupting the structural function.
02. Simplified overall design
Ability to reduce seismic energy from the ground into the structure, which simplifies the structural design.
03. Versatility
New construction or retrofit purposes
04. Maintenance free
Limited to periodic visual inspection throughout the design life
05. Taylor made
Optimized design to project specifications
06. Certified products
Compliance with all international standards, CE marking on request
07. Cost savings
The overall cost of construction and/or maintenance and/or repair is significantly reduced. Structures remain operational after an earthquake, limiting operational losses and reconstruction costs.
ISOSISM® HDRB (High Damping Rubber Bearing)
The ISOSISM® HDRB isolator is made of alternating layers of natural rubber and steel reinforcement plates bonded by vulcanizing.
It provides the appropriate level of horizontal stiffness to the structure and can dissipate energy thanks to specific high damping rubber compounds.
It is available in rectangular and circular shape.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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Low stiffness under seismic excitations
High stiffness under service loads (wind, braking, …) -
Moderate maximum displacement in seismic event
High recentering capability -
Moderate damping capacity, from 10 to 15%
ISOSISM® LRB (Lead Rubber Bearing)
The ISOSISM® LRB isolator is made of alternating layers of natural rubber and steel reinforcement plates bonded by vulcanizing. It has one or more cylindrical lead cores.
It provides the appropriate level of horizontal rigidity to the structure and can dissipate energy up to 30% damping thanks to the highly damping capacity of the lead core.
It is available in square, rectangular and circular formats for optimal space saving.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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High damping capacity, up to 30%
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Small deformations under service loads
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Moderate maximum displacement in seismic event
High recentering capacity
ISOSISM® PS (Pendulum System)
The ISOSISM® PS isolator is based on the application of a special sliding material (ISOGLIDE®), which has controlled friction and an outstanding resistance to wear and high temperatures. It has a curved sliding surface.
These properties make it particularly effective as a friction-based energy dissipation element.
The isolator can also be provided with a greased sliding material to reduce friction.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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High damping capacity, up to 35%
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High relative displacement in seismic events
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Particularly suitable for asymmetrical buildings
ISOSISM® FS (Flat Slider)
The ISOSISM® FS isolator is based on the application of a special sliding material (ISOGLIDE®), which has controlled friction and an outstanding resistance to wear and high temperatures. It has a flat sliding surface.
These properties make it particularly effective as a friction-based energy dissipation element.
The isolator can also be provided with a greased sliding material to reduce friction.
Applications: bridges, buildings, energy infrastructures.
Applications: bridges, buildings, energy infrastructures.
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High damping capacity, up to 35%
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No horizontal stiffness
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High relative displacement in seismic event
ISOSISM® HDRB (High Damping Rubber Bearing)
The ISOSISM® HDRB isolator is made of alternating layers of natural rubber and steel reinforcement plates bonded by vulcanizing.
It provides the appropriate level of horizontal stiffness to the structure and can dissipate energy thanks to specific high damping rubber compounds.
It is available in rectangular and circular shape.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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Low stiffness under seismic excitations
High stiffness under service loads (wind, braking, …) -
Moderate maximum displacement in seismic event
High recentering capability -
Moderate damping capacity, from 10 to 15%
ISOSISM® LRB (Lead Rubber Bearing)
The ISOSISM® LRB isolator is made of alternating layers of natural rubber and steel reinforcement plates bonded by vulcanizing. It has one or more cylindrical lead cores.
It provides the appropriate level of horizontal rigidity to the structure and can dissipate energy up to 30% damping thanks to the highly damping capacity of the lead core.
It is available in square, rectangular and circular formats for optimal space saving.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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High damping capacity, up to 30%
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Small deformations under service loads
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Moderate maximum displacement in seismic event
High recentering capacity
ISOSISM® PS (Pendulum System)
The ISOSISM® PS isolator is based on the application of a special sliding material (ISOGLIDE®), which has controlled friction and an outstanding resistance to wear and high temperatures. It has a curved sliding surface.
These properties make it particularly effective as a friction-based energy dissipation element.
The isolator can also be provided with a greased sliding material to reduce friction.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
Applications: bridges, buildings, energy infrastructures, water infrastructures, stadiums.
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High damping capacity, up to 35%
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High relative displacement in seismic events
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Particularly suitable for asymmetrical buildings
ISOSISM® FS (Flat Slider)
The ISOSISM® FS isolator is based on the application of a special sliding material (ISOGLIDE®), which has controlled friction and an outstanding resistance to wear and high temperatures. It has a flat sliding surface.
These properties make it particularly effective as a friction-based energy dissipation element.
The isolator can also be provided with a greased sliding material to reduce friction.
Applications: bridges, buildings, energy infrastructures.
Applications: bridges, buildings, energy infrastructures.
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High damping capacity, up to 35%
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No horizontal stiffness
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High relative displacement in seismic event
Download technical datasheets and CE Certificates
DocumentationBridge over Cornigliano railway, Genova, Italy / ISOSISM® HDRB
Melipilla Hospital, Chile / ISOSISM® HDRB and ISOSISM® LRB isolation systems
RN39 viaduct, Costa Rica / ISOSISM® LRB isolation system & Tetron SB bearings
CHU hospital Pointe à Pitre, Guadeloupe / ISOSISM® PS isolation system
CHU hospital Pointe à Pitre Guadeloupe / ISOSISM PS
CHU hospital Pointe à Pitre Guadeloupe / ISOSISM PS
ICOP logistic platform in Trieste, ICOP, Italy / ISOSISM® PS
Norcia project, Italy / ISOSISM® HDRB and FS
Indonesia Light Rail Transit elevated toll road / ISOSISM® LRB isolation system
ITER reactor, Cadarache, France / ISOSISM® HDRB isolation system
Find out more in our case studies
Build
Indonesia
Jakarta LRT seismic isolated superstructure
Space for a new elevated light rail system in the capital was in short supply. Freyssinet’s proposal to introduce a seismic isolated superstructure addressed this and even led to a 20 % reduction in costs.
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