Seismic Testing - Clark Testing

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Seismic Testing

Clark Testing Seismic Testing Laboratory primary Seismic tri-axial shake table is comprised of a 10 x 10 hexagon plate operating on an independent tri-axial hydraulic system. Clark Testing Seismic table is capable of performing seismic testing of large packages up to 20,000 lbs. (total test specimen weight including all fixtures) with ZPA of 1G. Higher ZPA's are achieved with lower weight.  Clark’s tri-axial shake table is designed to generate independent tri-axial motions (of different magnitude). The input can be sinusoidal, multi-frequency, or sine beat to achieve required input motion or response spectrum. Data acquisition and electronic monitoring systems are recording over 80 independent channels to insure the seismic test report is comprised of detailed and comprehensive data. This meets the specifications for industrial applications including IEEE 323 & 344, IEEE 693, IEEE 382, IBC-2012, AC-156, OSHPD and Bellcore specification. 

IEEE 323 and 344

Clark Testing provide seismic testing and equipment qualification services for the nuclear power industry in accordance with IEEE 323 & 344. IEEE 323 & 344 are the recommended practices for seismic qualification for Class 1E Equipment for nuclear power generating stations. Clark’s tri-axial seismic shake table and RIM shake table are qualified under Clark 10 CFR 50 Appendix B Quality Program for qualifying Class 1E equipment for the nuclear power industry.
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IEEE 382-2006 Random Input Motion - RIM Testing

Clark’s seismic capabilities also include Random Input Motion (RIM) that consists of two independent hydraulic shake tables. One vertical and one horizontal hydraulic shake tables to meet the requirements of IEEE 382-2006.
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IEEE 693

The Seismic Lab at Clark Testing has a large shake table that measure 10’ across a hexagon plate. The Clark seismic lab has a high ceiling height that allows for large vertical bushings, insulators and disconnect switches typically used in sub-stations. In addition to the large capacity shake table, Clark has large walk in thermal rooms that can accommodate larger T&D components.
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OSHPD Seismic Certification Testing

Clark Testing’s seismic test laboratory provides OSHPD certification test services utilizing its tri-axial seismic shake table. OSHPD Certification Testing is directed by the Office of Statewide Health Planning and Development (OSHPD), which is directed, by California Health and Human Services Agency to oversee the state’s healthcare organization and infrastructure. OSHPD seismic certification ensures the seismic safety of healthcare facilities within the state including hospitals and nursing care facilities.
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The IBC-2015 contains seismic design requirements for both buildings and electrical equipment installed therein. The standard incorporates, by reference, the design requirements of The American Society of Civil Engineers’ (ASCE) Minimum Design Loads for Buildings and Other Structures standard, referred to as SEI/ASCE 7- 02. Clark Seismic Lab has conducted a multitude of International Building Code (IBC & Uniform Building Code (UBC) seismic qualification test over the years. The larger shake table allows Clark to fabricate custom fixtures to simulate the installation of the component under test. Lighting systems, ceiling systems, floor systems, mechanical systems and wall systems are all part of our IBC & UBC seismic testing services.
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State of California’s Office of Statewide Health and Planning Division (OSHPD), now offers full seismic testing, certification, and report submittal for testing to AC-156, “Acceptance Criteria for Seismic Certification by Shake Table Testing of Nonstructural Components”. The seismic test specification, as maintained by ICC Evaluation Service, Inc. (ICC-ES), specifically defines the testing and requirements for equipment installed into new or updated hospitals in the State of California.
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Data Centers located in seismically active regions in the Unites States must be designed to protect the operating equipment in the event of an earthquake. Clark Testing’s seismic laboratory provides seismic certification for BELCORE GR-63-CORE or Telcordia GR-63-CORE. Clark’s shake table simulates an earthquake, shaking in three independent directions at varying levels of intensity equivalent to an earthquake in a particular seismic zone as designates by the USGS (Unite States Geological Survey): Zone 1 is the least intense, Zone 4 is the most intense.
Learn More about Bellcore GR-63

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