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This benchmark exercise is the continuation of the state of the art review (EUR 11369 EN) which concluded that the random vibration approach could be an effective tool in seismic analysis of nuclear power plants, with potential advantages on time history and response spectrum techniques. As compared to the latter, the random vibration method provides an accurate treatment of multisupport excitations, and non-classical damping as well as the combination of high-frequency modal components. With respect to the former, the random vibration method offers direct information on statistical variability (probability distribution) and cheaper computations. The disadvantages of the random vibration method are that it is based on stationary results, and requires a power spectral density input instead of a response spectrum. A benchmark exercise has been carried out to compare the three methods. The following aspects were covered with the simplest possible models: (i) statistical variability; (ii) multisupport excitation; (iii) non-classical damping. The random vibration method was concluded to be a reliable method of analysis. Its use is recommended, particularly for preliminary design, owing to its computational advantage on multiple time history analysis.

Additional information

Authors: PREUMONT A, Belgonucléaire NV (BE);SHIHAB S, Belgonucléaire NV (BE);CORNAGGIA L, Ansaldo;REALE M, University of Firenze (IT);LABBE P, Electricité de France (FR);NOE H, Electricité de France (FR)
Bibliographic Reference: EUR 14153 EN (1992) 84 pp., FS, ECU 10.50
Availability: (2)
ISBN: ISBN 92-826-4287-9
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