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.
Our technical teams will assist you to:
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.
Prototypes will be produced in-house and tested in our ISOLAB facility in Italy, in order to confirm the right design.
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.
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
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.
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 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.
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.
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® connectors create a rigid connection between the superstructure and the supporting structures during quick displacements typical of seismic events and allow free movement in normal operating conditions.
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. It comprises moulded elastomeric elements, vulcanized and bonded to metal inserts designed to accommodate rolling loads and distribute loads in the fasteners.
Movement of SFX joint in longitudinal (above) and transversal (below)
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