PurposeWave barriers like trenches and piles are used as an anti-vibration system, to reduce the harmful damages caused by heavy traffic or earthquakes. From this point, many studies are developed to investigate the attenuation efficiency of periodic wave barriers using either the theory of the periodic structure according to the concept of the band gap, or laboratory scale study and numerical modeling like the boundary element or finite element method. Infact, in this article, we compare the periodic trench and the periodic pile barrier in terms of reducing vibration induced by earthquakes.MethodsFirst, we developed a 3D finite element method which is validated by comparing it with some related studies. Second, we carried out a parametric study to evaluate the impact of mechanical parameters and geometrical ones on the attenuation effectiveness of two periodic structures.Results and ConclusionNumerical results show that the physical parameters of soil, depth, and spacing improve the attenuation capability of periodic trenches and periodic piles. Furthermore, periodic trenches outperform periodic pile barriers in the isolation of ground vibration in both directions the vertical and the transverse.
来源平台：JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
