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Obtaining Reliable Data from Fragility Tests

by John R. Hendricks, Farwell & Hendricks Inc, Milford, OH, USA,
William M. Rusen, Farwell & Hendricks Inc, Milford, OH, USA,
David P. Rettig, Farwell & Hendricks Inc, Milford, OH, USA,



Document Type: Proceeding Paper

Part of: Seismic Experience Data?Nuclear and Other Plants

Abstract:

The parameters discussed in this paper are the same as those present in normal seismic qualification testing. These parameters behave differently in high level acceleration tests and their contribution in providing unreliable data is of major concern since there is a significant difference. These parameters need to be considered in developing methodology guidelines for future fragility standards. In seismic qualification testing, a predefined series of tests are performed and measured against a set of acceptance criteria. The response spectra generally has a peak acceleration of between 3-10 g's at a 2% damping value for the Design Basis Event (Safe Shutdown Earthquake). Fragility level testing has a minimum starting point of 10 g's at 2% damping and is generally 20 g's at 2% damping. The dynamic characteristics of the simulated earthquake and the corresponding simulator hardware interfaces will be the parameters discussed.

Subject Headings: Seismic tests | Parameters (statistics) | Dynamic structural analysis | Damping | Structural dynamics | Material tests | Material properties

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