Feasibility analysis of using MetaSoil scatterers on the attenuation of seismic amplification in a site with triangular hill due to SV-waves. Issue 100 (September 2017)

• Record Type: Journal Article
• Authors: Maleki, M.; Khodakarami, M.I.
• Is Part Of: Soil dynamics and earthquake engineering. Issue 100(2017)
• Page Start: 169
• Page End: 182
• Publication Date: 2017-09
• Subjects: Attenuation -- Seismic amplification -- MetaSoil -- Topographical irregularity -- External isolation; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2017.05.036
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: Experimental and theoretical studies show an extra amplification in the site response near topographic irregularities due to seismic waves. The aim of this paper is to assess the implementation of a mass-in-mass periodic external isolator framework based on the concept of metamaterials, termed MetaSoil (MS) in order to reduce the seismic amplification on hills subjected to in-plane waves. A MS prepares a blind frequency zone, where the propagation of waves with this frequency content is excluded. The feasibility of using such systems considering various soil types, aspect ratio of the hill shapes, geometry of MS and excitation frequencies is investigated. In achieving this end, several two-dimensional models by adopting the finite element method and the wave propagation theory are analyzed using a time-history approach. The efficiency of this system is evaluated for each model, with results demonstrating up to 40% attenuation in the strong ground motions on the hills via the use of the proposed lattice. Highlights: Feasibility of using MetaSoil(MS) on the site-effects near triangular topographical irregularities is investigated.. Two-dimensional finite element model is developed for simulation of soil and MetaSoil. Effects of shape factor on the performance of MS is investigated. Effects of excitation frequency of in-plane waves on the performance of MS is investigated.