Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A Study on the Rayleigh Wave Attenuation Provided by Gabion Mats using a Coupled IBEM-FEM Model
Submission Author:
Leonardo Antoniazzi Marques , SP , Brazil
Co-Authors:
Leonardo Antoniazzi Marques, David Andrade Soares Carneiro, Josue Labaki
Presenter: Leonardo Antoniazzi Marques
doi://10.26678/ABCM.COBEM2023.COB2023-0124
Abstract
L. A. Marques¹, D. Carneiro² and J. Labaki¹ ¹ School of Mechanical Engineering, University of Campinas. 200 Mendeleyev St, Campinas SP Brazil ² KU Leuven, Dept. of Civil Eng., Structural Mechanics Section, Kasteelpark Arenberg 40 box 2448, B-3001 Leuven, Belgium Email addresses: l201083@dac.unicamp.br (Leonardo Marques), david.carneiro@kuleuven.be (David Carneiro), labaki@unicamp.br (Josué Labaki) This article presents a study on ground vibration attenuation induced by flat surface structures, such as gabion mats and concrete slabs. The objective of this research is to understand the mechanisms of attenuation that surface structures of different dimensions and constitutive properties are able to provide and also find optimal configurations for maximum vibration attenuation. Railway traffic and busy roadways are important sources of ground vibration, which can lead to disturbances in the lives of people who live near them. Understanding how this unwanted vibration can be reduced is key to improve life quality and also an example of practical benefit that can be achieved from this study. The materials used in the analyses are designed to reduce the construction cost of protection against ground vibration, since they are relatively inexpensive to build and to maintain. The analyses consider ground vibration resulting from seismic excitation in the form of plane Rayleigh waves and from arbitrary transient sources applied at the soil surface. A coupled IBEM-FEM model is used for the study, in which surface plates are modeled via classical finite elements, and the response of the soil is modeled via superposition of soil influence functions, within an Indirect Boundary Element Method (IBEM) framework. Coupling between the two subsystems is obtained by imposing continuity and equilibrium conditions at the soil-plate interface. The dynamic response of the coupled system is derived in the frequency domain, in which the coupled equations of motion can be solved algebraically. The paper discusses the mechanisms by which the vibration attenuation occurs and compares them to previous studies. The article also discusses the similarities and differences between the surface plate case and the surface wall case, which has previously been studied by the authors of this paper. Selected numerical results for various constitutive parameters are presented, and show that flat surface structures may be an effective measure against ground vibration.
Keywords
Ground Vibration, Vibration Attenuation, Soil-Structure Interaction, coupled methods, Gabion mats
