Pioneer in the development of earthquake protection devices, Freyssinet offers a complete range of dedicated products and associated services marketed under the well-known ISOSISM® brand.

  • Applications
    Bridges
    Stadiums
    Water infrastructures
    Energy infrastructures
    Viaducts
Benefits

Why choose ISOSISM® systems

01. Wide range of applications

New structures, retrofitting of existing structures, post-earthquake repair. Bridges and viaducts, industrial and energy facilities, heritage buildings, hospitals and schools.

02. Wide range of solutions

Based on four concepts, used alone or combined together: Isolation - Dissipation by damping - Connection - Junction

03. Cost savings

On average, initial savings of 15% on the project overall cost. Continued operations after an earthquake and lower rebuilding costs.

04. Environment-friendly

Earthquake protection devices allow to considerably lighten the superstructure and the foundations of a structure.

05. Low maintenance

Easy installation & replacement, low maintenance.

06. Approved systems

Conformity to all international standards, CE marking on request.

07. Tailored solutions

Not only products. But solutions tailored to the seismic risk, the structure, its environment and your economic constraints.

08. Full service

From risk and structure analysis to installation of seismic solutions and maintenance.

ISOSIM at a glance

A double expertise upstream

ISOSISM device

Our technical teams will assist you to:

  1. Analyse the seismic behaviour of your structure
  2. Select the appropriate protection solution

We make this dual expertise available to structural designers and clients, providing them with practical solutions to optimize the overall cost of the structure and minimise the seismic risks of their infrastructure project.

ISOSISM®: an all-inclusive offer

From risk assessment to installation... and maintenance

Risk assessment, evaluation of protection options and design

  • Assessment of the seismic behaviour of the structure by means of a linear spectral analysis and a non-linear time history analysis
  • Definition of the seismic performance requested
  • Design of the device adapted to these specifications

Prototypes will be produced in-house and tested in our ISOLAB facility in Italy, in order to confirm the right design.

Guarantee of the product performance and quality

The supply chain and manufacturing are done according to CE marking requirements.
Production tests can be carried out in order to guarantee reproducible performance. For CE marking for instance, 20% of the production is tested in our ISOLAB laboratory, whose equipment is unequalled in Europe.

Technical support or full installation

Freyssinet proposes on-site technical assistance to help its customer install the ISOSISM device in compliance with the rules of art and the specifications.
On request, Freyssinet teams can also manage the full installation of the seismic devices including all associated works.

Photo credit : ITER Organization

Inspection and maintenance

Following an earthquake, Freyssinet’s technicians and engineers can inspect the seismic devices in order to assess the repair needs and propose structural repair or strengthening works.

Seismic protection devices

Isosism® damping systems

ISOSISM® damping systems allow to dissipate part of the energy generated by an earthquake so as to minimize its impact on the structures. They are particularly effective under quick stresses (earthquakes, boat impacts, etc) and offer very low resistance to slow movements under service conditions. They can be used in combination with an isolation system, especially High Damping Rubber Bearings, to reduce structural displacement while limiting the stresses to which structures are subjected.

Isosism® isolation systems

ISOSISM® isolation systems increase the fundamental period of vibration of the structure to be protected. They reduce the response to seismic acceleration, which is reduced by a factor of two to three.

Isosism® connection system

ISOSISM® Shock Transmission Unit (STU) is used to connect buildings together, or to create a fixed point on a civil engineering structure in the event of an earthquake, emergency braking by a high-speed train or gale.

Isosism® junction system

The ISOSISM® SFX joint is a supported mat joint in which movement imposed by the main structure is absorbed by deformation of the elastomeric sections.

Seismic retrofitting

From proposing a seismic protection strategy to delivering and installing systems designed, manufactured and tested in-house, we offer turnkey solutions for retrofit, seismic strengthening and post-earthquake repair projects of existing structures.

Download ISOSISM brochure

Documentation
Documentation

Find out more in our case studies

Main cover
France

ITER seismic isolation bearings

Almost five hundred special isolation bearings were manufactured and installed with high precision to protect the International Thermo-nuclear Experimental Reactor (ITER) from earthquake damage.
Discover more

Contact us

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