Effect of Second Hardening on Floor Response Spectrum of a Base-isolated Nuclear Power Plant

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The floor response spectra are calculated by constructing a numerical model (APR1400) equipped with base isolators of a bilinear material and a Bouc-Wen material, respectively, in order to investigate the effect of the second hardening. The variations of the earthquakes are incorporated to the loads, and two different properties of the isolator materials are modeled. The second hardening behavior increases the stiffness of the isolator in the high strain regime and suppresses the displacement of the isolator. Therefore, the role of the base isolation device isolating the superstructure from the ground motion does not perform properly, which causes amplification of the floor response of the superstructure. In practice, the second hardening of the isolator material might need to be taken into account for designing the base isolation system.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2017-10
Language
English
Article Type
Article
Keywords

BOUC-WEN MODEL; ACCELERATION DEMANDS; MULTISTORY BUILDINGS; SYSTEMS

Citation

NUCLEAR ENGINEERING AND DESIGN, v.322, pp.138 - 147

ISSN
0029-5493
DOI
10.1016/j.nucengdes.2017.06.004
URI
http://hdl.handle.net/10203/226399
Appears in Collection
CE-Journal Papers(저널논문)
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