The Elastomeric Seismic Isolators Are used to control the interaction of loads and movements of an earthquake between beams and stacks that support a particular structure of a building, its main use is in buildings where we have a low center of gravity.

Buildings are part of their structural set, and insulation devices help dissipate a displacement caused by the movement of the earth by partially absorbing the energy of the seismic activity in the structure.

Types of Seismic Isolators

Each Seismic insulator performs a specific function based on structural calculations, we can distinguish the following types.

This process begins with the reception of the requirements specified by the client, the type of Isolator is determined and categorized as follows:

The high damping isolator eliminates the use of a lead core, providing the same functionality. This elastomeric insulator is internally composed of metal plates intercalated with elastomer layers. The inner rubber has the ability to provide flexibility and rigidity required for this type of insulator.

Due to the chemical composition of the elastomer provides excellent damping, which makes it useful when absorbing the movements due to earthquakes and the environmental conditions present at the installation site.

Ensures that buildings such as buildings and bridges, achieving less damage, less panic and safer environments.

The seismic lead insulator is made of A36 steel sheets, interspersed with elastomer sheets vulcanized between the steel plates, has a central core of lead, while the inner rubber provides a spring effect, the inner core provides a greater Cushioning. Because the shock absorber does not come separately, it is a good choice for areas with limited space. It has the possibility of modifying the degree of damping as the diameter of the lead plug changes.

The curing of the rubber is constantly checked to ensure uniform vulcanization in each part of the insulator bearing

This type of insulator uses natural rubber, which has a low damping factor compared to the others. Despite that it has a stable restorative force. Its design gives it great flexibility, although it does not have its own damping system.

The insulators significantly reduce the rigidity of the structural system, making the fundamental period of the insulated structure much larger than that of the same fixed base structure

The composite support is manufactured from high quality vulcanized neoprene rubber according to ASHTO, ASTM, Nevi-12.

This support has as reinforcement inner plates of Steel manufactured under Standard ASTM A36

Features

All our insulators are made to measure, based on customer specifications.

  • They are formed by layers of elastomer and steel plates
  • Neoprene and Natural Rubber High quality vulcanized rubber according to ASSHTO standard.
  • Steel Plates Standard ASTM A36
  • Standards NEVI-12
  • Made to ISO 9001: 2015 quality standards

NEOPRENO technical specifications

Test

Value

Units

Testing method

IR spectroscopy Neoprene FT-IR Spectrum ASTM D3677-10
Indent Hardness 65±5* Shore A ASTM D 2240
Burst Load >190 Kgs /cm² ASTM D 412
Elongation at Break 45 a 65 ≥425
56 a 65 ≥350
66 a 75 ≥300
% ASTM D 412
Steel-rubber adhesion ≥11.8 N/mm ASTM D429 Method B
Tear Resistance ≥32 kNm ASTM D624 (Molde C)
Low Temperature Resistance -30 ºC ASTM D 1329
Resistance to ozone No cracks ASTM D 1149  (D518 method A) 100 ppm O (100 hours a 38ºC)
Remaining Deformation 35 % from. Maximum ASTM D 395 Method B (22 hours a 100º C)
Thermal Aging 15
-15
-40
± Shore A
% Initial load
% Initial elongation
ASTM D573 By hot air (70 HOURS 100º C)
Construction method for bridges AASHTO M251

Technical Characteristics of A36 Steel

Elastic limit (MPA) ≥ 250
Resistance to attraction (MPA) ≥ 390
Minimum elongation 200 mm (%) ≥ 20
Minimum elongation 50 mm (%) ≥ 23

Projects

See catalog

Request InformationGet a quote

Need a more detailed quote?



Structural Support Products