Anti-seismic devices - Import export

They are divided into two categories: Fluid viscous dampers OP, OTP Spring fluid viscous dampers OVE, OVE*

They are divided into two categories: ELASTOMERIC Elastomeric isolators SI Elastomeric isolators with lead core LRB SLIDING Curved surface sliders FIP, FIP-D Flat surface sliders with dampersi VEL, VEP, VOP, VOTP, VELOP, VELOTP

They protect buildings, bridges, flyovers, or any other facility, changing their reaction to the seismic action or other dynamic actions (for example wind). Most seismic devices are used within the innovative approach to seismic engineering, to change the seismic reaction of a structure by seismic isolation and/or energy dissipation. Namely: • ISOLATORS: they limit the acceleration transferred to the structure and reduce inertial stress by increasing the oscillation period. • DAMPERS: they dissipate part of the energy transferred to the structure according to their constitution, based on which they are divided into two large families, speed-dependent devices and displacement-dependent devices. On the other hand, FIXED RESTRAINT DEVICES are traditionally used in the traditional approach to seismic engineering, to transfer horizontal stress. TYPES: Seismic isolators Speed-dependent devices Displacement-dependent devices Fixed restraint devices

They are divided into three categories: TEMPORARY Shock transmitters OT PERMANENT Guides and restraints GU, NET, FP, MCT MECHANICAL FUSE Mechanical fuse restraint devices SR

They are divided into two macro-categories: NON-LINEAR Steel hysteretic dampers MEL, MEP, BRAD Elastic devices NE Shape-memory alloy devices SMAD LINEAR Elastomeric visco-elastic damper s EVED