Sinusoidally located concrete metastructures for attenuation of seismic surface vibrations

• Published in: Natural hazards (Dordrecht) Vol. 116; no. 1; pp. 551 - 563
• Main Authors: Kacin, Selcuk, Ozturk, Murat, Sevim, Umur Korkut, Karaaslan, Muharrem, Akgol, Oguzhan, Ozer, Zafer, Demirci, Mustafa, Unal, Emin, Mert, Bayram Ali, Alkurt, Maide Erdoğan, Alkurt, Fatih Özkan, Başar, Mustafa Tunahan, Kaya, Seyda Gülsüm
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.03.2023; Springer Nature B.V
• Subjects: Accelerometers; Attenuation; Boreholes; Civil Engineering; Design; Earth and Environmental Science; Earth Sciences; Environmental Management; Fast Fourier transformations; Fourier transforms; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Interpolation; Metamaterials; Natural Hazards; Original Paper; P-waves; Radiation; Radiation shielding; Seismic activity; Seismic waves; Transmission loss; Vibration; Vibrations; Experimental measurement; Attenuation; Low frequency; Seismic metamaterials; Surface vibration
• ISSN: 0921-030X; 1573-0840
• DOI: 10.1007/s11069-022-05688-y

In this numerical and experimental study, we designed sinusoidal located concrete-based boreholes which are candidate for seismic shielding applications. To attenuate seismic wave transmission in an area, proposed design is created in most dangerous part of seismic frequencies which corresponds 1–15 Hz band. Firstly, transmission loss characteristics of proposed design is obtained numerically, and it is clearly shown that proposed design has multiband blocking capability. Afterwards, total surface displacements were plotted, analysed and explained. Thus, proposed design attenuates seismic wave transmission according to numerical results. Moreover, to support proposed design, various experimental measurements were carried out by using a harmonic vibration source and 14 accelerometers as sensors. Experiments conducted in time domain and obtained results were converted to the frequency domain by fast Fourier transform, and mapping processes were done by interpolation technique. The obtained measured map of the seismic radiation between 5 and 15 Hz bands is given, and a good matching between simulations and experiments has been seen. As obtained numerical and experimental results, the proposed metamaterial structure could be used in seismic shielding applications because of its highly blocking capability of seismic wave transmission.