Composite periodic foundation and its application for seismic isolation

Summary This paper proposes a novel multidimensional composite periodic foundation for seismic isolation. The composite periodic foundation achieves multidimensional attenuation by innovative arrangement of periodic structures and taking advantage of the directional attenuation zone of periodic stru...

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Bibliographic Details
Published inEarthquake engineering & structural dynamics Vol. 47; no. 4; pp. 925 - 944
Main Authors Cheng, Z.B., Shi, Z.F.
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 10.04.2018
Subjects
Attenuation
composite periodic foundation
directional frequency attenuation zone
Fourier analysis
Harmonic analysis
Nuclear energy
Nuclear power plants
Periodic structures
Plant structures
Seismic isolation
Vibrations
Wave attenuation
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Summary:Summary This paper proposes a novel multidimensional composite periodic foundation for seismic isolation. The composite periodic foundation achieves multidimensional attenuation by innovative arrangement of periodic structures and taking advantage of the directional attenuation zone of periodic structures. Directional attenuation zones of periodic structures are derived for the in‐plane wave, and the impact of geometrical parameters of the periodic structure on the characteristics of the directional attenuation zones is studied. The effectiveness of the proposed composite periodic foundation is demonstrated through application in seismic isolation for nuclear power plant structures. Harmonic analysis and time history analysis results show that the proposed composite periodic foundation with low‐frequency directional attenuation zones can effectively reduce vibrations of the upper structure in both horizontal and vertical directions.
ISSN:0098-8847
1096-9845
DOI:10.1002/eqe.2999