Abstract
The concept of frequency band gaps that has been widely used in many disciplines of physics and semiconductors is extended to other phenomena such as seismic vibrations. This paper presents the potential of an approach based on periodic arrays to protect a site from seismic effects. The scheme consists of a periodic arrangement of inclusions that act as a barrier to divert or attenuate the propagation of the seismic waves. The aim is to seek large low frequency gaps within the range of the earthquake ground motion frequency content. To this end a numerical study of two periodic arrays (1D and 2D) has been conducted to bring out the potential to block the propagation of seismic surface waves. The obtained numerical results show that under certain conditions, a band gap can be shifted to the low frequency range (7.91 to 21.13 Hz) which is suitable for application in seismic engineering. It is recognized that the models used in this study are very simplistic compared to reality, and therefore more research work is needed to corroborate these results by investigating the transmissibility of the system with different materials and configurations.
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Bougressi, A., Bourahla, N., Doufene, M.A. (2018). Potential of Periodic Networks for Seismic Isolation of Sites. In: Tran-Nguyen, HH., Wong, H., Ragueneau, F., Ha-Minh, C. (eds) Proceedings of the 4th Congrès International de Géotechnique - Ouvrages -Structures. CIGOS 2017. Lecture Notes in Civil Engineering , vol 8. Springer, Singapore. https://doi.org/10.1007/978-981-10-6713-6_93
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DOI: https://doi.org/10.1007/978-981-10-6713-6_93
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