EP&C Seismic Isolation Systems is active in the research, development, and production of Fiber Reinforced Elastomeric (FRE) Seismic Isolators. These innovative seismic isolators are Cost-effective with excellent Isolation Efficiency and Energy Dissipation Capability. These new and advanced seismic isolators are Light in weight and small. These unique features make these low-cost seismic Isolaters highly efficient in handling, transportation, and implementation. EP&C FRE seismic isolators are designed and manufactured in two different types with FRE bearings having square and circular cross sections.
EP&C Seismic Isolators Type “F-1”
EP&C Seismic Isolator Type “F-1” has cylinder-shaped CFRE bearings with circular cross sections. Table (F-1) shows Their approximate engineering properties. the isolators are manufactured in five sizes depending on the project’s design requirements.
EP&C Seismic Isolators Type F-1
TYPE | BEARING SIZE (øexh) mm | PLATE "A" mm øaxta | PLATE "C" mm øsxta | MAX, AXIAL COMP, Pr- KN | MAX.LATERAL DISPLACEMENT DI mm |
A | 250x150 | 250x15 | 100x10 | 300 | 150 |
B | 300x200 | 300x15 | 150x10 | 400 | 200 |
C | 400x250 | 400x20 | 200x15 | 750 | 250 |
D | 500x300 | 500x25 | 250x15 | 1150 | 300 |
A | 600x350 | 600x25 | 300x20 | 1650 | 350 |
Table (F-1) – EP&C Seismic Isolators Type F-1 Engineering Properties
EP&C Seismic Isolators Type “F-2”
These seismic isolators are manufactured with FRE bearings having a square cross-section. Depending on the design requirement, they are supplied in five different sizes, as shown in chart (F-2), which displays their engineering properties.
EP&C Isolators Type F-2
TYPE | BEARING SIZE mm | PLATE "A" mm | PLATE "C" mm | MAX, AXIAL COMP, Pr- KN | MAX.LATERAL DISPLACEMENT DI mm |
A | 250x250x150 | 250x250x15 | 200x200x10 | 375 | 150 |
B | 300x300x200 | 300x300x15 | 250x250x10 | 500 | 200 |
C | 400x400x250 | 400x400x15 | 300x300x20 | 6950 | 250 |
D | 500x500x300 | 500x500x20 | 350x350x20 | 1450 | 300 |
A | 600x600x350 | 600x600x25 | 400x400x20 | 2100 | 350 |
Table (F-2) – EP&C Isolators Type F-2 Engineering Properties
Why We Recommend EP&C Seismic Isolators
The innovative Fiber Reinforced Elastomeric (FRE) Isolators are Cost-effective in comparison with the conventional steel-reinforced elastomeric Isolators. They are designed and developed to effectively improve and enhance the dynamic performance of buildings during destructive earthquakes. EP&C seismic Isolators are designed to protect not only the important buildings with sensitive contents but to efficiently protect the common residential and commercial buildings as well. With close attention to the energy dissipation capabilities, isolation efficiencies, and affordability, the application of EP&C seismic isolators is most often a better design alternative in retrofitting and rehabilitation of the existing building structures. More design features, application efficiencies, and capabilities are summarized in this page.
1- EP&C Seismic Isolators are Cost-effective and Affordable
EP&C Fiber Reinforced Elastomeric (FRE) seismic isolators are cost-effective in comparison with the same size conventional steel reinforced elastomeric (SRE) isolators with even higher isolation efficiency. The unique design feature together with the economic and cost-saving advantages promotes developers to implement these low-cost seismic isolators not only to seismically isolate and protect important structures but also to protect common residential and commercial buildings during intensive earthquakes.
2- EP&C Seismic Isolators are Light In Weight & Portable in Size
To manufacture these innovative FRE seismic isolators, lightweight high-strength fibers are used as elastomer reinforcement. The adoption of fiber layers instead of steel sheets makes EP&C seismic isolators to be very light in weight. EP&C Isolators are also small in size and portable in comparison to SRE conventional isolators having the same isolation performance. These two isolators’ unique features effectively contribute to decreasing the handling, transportation, and more importantly the implementation cost.
3- EP&C Seismic Isolators are Efficient in Performance & Application
EP&C seismic isolators have great energy dissipation capability. They are designed to have high isolation efficiency (IE) and as a consequence capable of enhanced dynamic performance during earthquake-strong motions. EP&C seismic isolators are not only efficient in energy dissipation and dynamic performance but they are also efficient in implementation at the construction site. The lightweight and portable isolator’s components can be easily assembled at the construction site before implementation.
4- EP&C Seismic Isolators Bearing Component are Removable/Replaceable
To provide maximum performance assurance and safety, the EP&C seismic isolators are uniquely designed and developed so that the isolator’s bearing can be removable from the isolators while under structure loading. This unique feature allows safety inspection and experimental testing possible during the building life if necessary. Removing and re-installing of bearing is very efficient even years after the isolator’s performance under building-induced loads.
5- EP&C Seismic Isolators are equipped with wind vibration control devices
Conventional Elastomeric Base Isolators are most often combined with sliding Teflon isolators distributed in certain configurations over the isolation plan to achieve the required level of lateral stiffness to prevent isolated buildings’ lateral displacement or vibrations due to wind/service-induced forces. The problem with the implementation of these combination types is the uncertainty about the lateral breakaway shear forces or the initial stiffness of the sliding isolators after a long period and their unpredictable effects on the isolation performance. Implementation of EP&C Seismic Isolators eliminates the need for these types of combinations.