Application of energy absorbing layer to soil-structure interaction analysis

Abstract

Abstract Simulating for wave spread in geomechanics can be considered as an important subject within dynamic analysis. Chiefly, studying the soil-foundation interaction represents a stimulating matter in geotechnics studies. This paper presents the development of a reliable and efficient technique for the numerical simulation of unbounded domain (the semi-infinite extension). Absorbing layer is used to create boundaries that significantly decrease the wave reflecting into bounded area. The current work is divided into two parts. The first part is evaluation of the absorbing layer properties such as damping constants (αd , βs ), modulus subgrade reaction (K), modules of elasticity (E), and natural frequency of the soil (ωn ). The second part includes the dynamic analysis of strip foundation carried out by using the finite element software, OpenSees 2D. The foundation is exposed to harmony excitation and the soil is assumed as linear elastic. The results suggest that, attenuation in wave is observed once the soil’s unbounded area gets signified via the energy’s layer of absorption. Furthermore, the numerical model show that the maximum amplitude of displacement will be reduced due to the presence of absorbing layer.