Assessment of assembly shape and geometric effects on amplification of shear waves using discrete element method--颗粒学报PARTICUOLOGY

Karbor, L., Mir Mohammad Hosseini, S. M., & Bagherzadeh Khalkhali, A. (2022). Assessment of assembly shape and geometric effects on amplification of shear waves using discrete element method. Particuology, 66, 85-99. https://doi.org/10.1016/j.partic.2021.08.008

Assessment of assembly shape and geometric effects on amplification of shear waves using discrete element method

Leila Karbor ^a, Seyed Majdeddin Mir Mohammad Hosseini ^a *, Ahad Bagherzadeh Khalkhali ^b

a Civil and Environmental Engineering Faculty, Amirkabir University of Technology, Tehran, Iran
b Civil Engineering Faculty, Science and Research Branch, Islamic Azad University, Tehran, Iran

10.1016/j.partic.2021.08.008

Volume 66, July 2022, Pages 85-99

Received 11 February 2021, Revised 9 June 2021, Accepted 3 August 2021, Available online 7 September 2021, Version of Record 5 November 2021.

E-mail: smmirhos@aut.ac.ir

Highlights

• Shear wave propagation was simulated using discrete element method (DEM).

• Assembly shape effect on the amplification factor was studied.

• Various assembly shapes caused the amplification occur at different locations.

• Amplification factor of triangular assembly was more than trapezoidal one.

• Rectangular assemblies with an aspect ratio of >3.25 showed amplification.

Abstract

The discrete element method (DEM) is a capable tool used to simulate shear wave propagation in granular assemblies for many years. Researchers have studied assembly shapes such as rectangles (in 2D simulations) or cylinders and cubes (in 3D simulations). This paper aimed to qualify the effect of assembly shape on the shear wave propagation and maximum amplification in the vertical plane (horizontal and vertical directions) caused by this propagation. To this end, shear wave propagations in different assembly shapes such as rectangle, trapezium, and triangle with rigid boundary conditions were simulated. A sine wave pulse was applied with a point source by moving a particle as the transmitter particle. To evaluate the shear wave velocity of the assemblies, the transmitter and receiver particles were simulated. All the simulations were performed with 2D DEM which is a useful tool to determine the amount and location of the maximum amplification factor of the assembly in both horizontal and vertical directions. An advantage of this study was assessing the effect of parameters such as input wave frequency, assembly height, shape, and aspect ratios on the amplification of the input waves.

Graphical abstract

Keywords

Wave propagation; Granular assembly; DEM; Assembly shape; Shear wave

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