The Best Anti-Seismic Solution for Our Property: Rolling-Type Seismic Isolation Devices

Earthquakes are inevitable in Taiwan. A rare and severe earthquake, such as the 1999 Chi-Chi Earthquake, would cause many casualties and remain unforgettable. However, it is not well known that frequent moderate earthquakes may affect the regular operation of the most important facilities and industries in Taiwan, thus, greatly threatening people’s life and impacting Taiwan’s competitiveness.

When most structural elements remain intact during or after an earthquake, the desired performance of a building may not be achieved if the housed equipment or facilities are damaged. This situation has often occurred during or after many historical earthquakes. For instance, computers, servers, data storage equipment, networks, and telecommunications of high-tech industries, telecommunication industries, data centers, banks, and emergency-response centers have not remained operational; high-precision equipment, power generators, and medical instruments of high-tech factories and hospitals have not remained functional; valuable antiques, arts, and exhibits in museums and historical research institutes have suffered serious damage. These past lessons have raised awareness of issues regarding the enhancement of anti-seismic performance for critical equipment and facilities in the relevant industries and organizations.

Rolling-Type Seismic Isolation Device

Rolling-Type Seismic Isolation Device

The installation of seismic isolation devices underneath the to-be-protected equipment or facilities is the easiest and most practical approach to mitigate seismic risk. The rolling-type seismic isolation device developed by the National Center for Research on Earthquake Engineering (NCREE), the National Applied Research Laboratories (NARL) can provide a most effective seismic isolation strategy for the relevant industries and organizations.

The malfunction of high-precision equipment and the damage to valuable antiques during an earthquake are mainly caused by two factors, excessive transmitted acceleration and deformation responses. The rolling-type seismic isolation device designed with a multi-roller mechanism on sloped surfaces, together with a friction damping mechanism, can solve the above problems and effectively prevent the to-be-protected object from shaking, malfunction, and even damage. This device has been verified through a series of numerical analyses, high standard tests, and seismic qualification of various countries and codes. In addition, numerous domestic and international patents have been received. At present, this device is a mature product that can have the best anti-seismic performance and meet different requirements from any industry.

Unique and Optimum Anti-Seismic Performance

Basic Design Concept of Rolling-Type Seismic Isolation Device

Illustration of Synchronous Movement of Multi-Roller Mechanism

The rolling-type seismic isolation device is superior to other anti-seismic products which are intended to work only under severe earthquakes yet cannot protect the high-tech equipment from malfunction under moderate earthquakes. In addition, because of the insufficient damping capability of these products, excessive isolation displacement will cause an uneconomical use of space and even possibly lead to an undesired overturning problem.

By using the rolling-type seismic isolation device, the acceleration transmitted to the important equipment above can remain essentially constant regardless of the earthquake intensity. The built-in damping mechanism can significantly reduce the isolation displacement. In addition, this device has an inherent gravity-based self-centering capability after an earthquake. A custom-made design can also be provided to meet different requests. For example, for high-precision equipment in the semiconductor industry, a custom-made device with superior performance and better acceleration control can be designed and delivered.

Design for Single Cabinet

Design for Combination of Cabinets

Design for a Whole Region (Isolated Raised Floor System)

At present, the rolling-type seismic isolation device has been practically applied to the internet data center of the National Center for High-performance Computing (NCHC), NARL, the internet data center of the National Disasters Prevention and Protection Commission (NDPPC), the antique storage cabinets of the Institute of History and Philology, Academia Sinica, the supercomputer of the Central Weather Bureau (CWB), the network and telecommunication server of Chunghwa Telecom, and the data storage equipment of Chunghwa Post. The protected equipment and facilities in these practical applications were intact and still operational without shutdown under numerous real earthquakes, indicating that the rolling-type seismic isolation device could effectively reduce the direct and indirect losses, as well as have significant advantages for Taiwan’s productivity and competitiveness.


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