Finite Element Modeling of Soil Structure Interaction System with Interface: A Review
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ORIGINAL PAPER
Finite Element Modeling of Soil Structure Interaction System with Interface: A Review Gaurav D. Dhadse1 · G. D. Ramtekkar1 · Govardhan Bhatt1 Received: 15 March 2020 / Accepted: 30 September 2020 © CIMNE, Barcelona, Spain 2020
Abstract Non-linear analysis of soil structure interaction problem is still an active field of research due to development of useful interface element between the soil–soil and soil–structure. In this paper a focused review on coupled finite element modeling of soil structure interaction (SSI) system with soil non-linearity and interface element modeling is discussed. The non-linearity in soil is reviewed with various available constitutive models, whereas the Interface modeling is reviewed with zero thickness and thin layer elements, which is proposed by many researchers from 1970 to till date with special emphasis on behavior of superstructure. Further the paper discusses on the occurrence of ill conditioning due to significance of interface thickness and selection of normal and tangential stiffness during interface modeling. In addition to above, some special interface element (different degree of freedom on top and bottom face of element) in non-linear SSI is also reviewed. Therefore the attention is on advantages and disadvantages of the discussed methods according to their applicability, accuracy and caliber to idealize the superstructure and soil.
1 Introduction The analysis of the interaction between structure, foundations and soil media is of fundamental importance to both structural and geotechnical engineering. Results of such analyses provide information which can be used in structural design and in analysis of stresses and deformations within the supporting media [1]. Thus, the interest in above topic has generated a variety of analytical and experimental studies in Soil Structure Interaction (SSI) Analysis. The primary objective of this paper is to review the FE modeling and analysis of Linear and non linear soil structure interaction study with interface modeling. SSI analysis is classified based on method of analysis, treatment of superstructure & soil and treatment of interactions. Here, based on method of analysis it is discussed as Analytical and Numerical Method. Analytical analysis includes the SSI analysis with soil as skeletal spring (called as Mathematical model) whereas Numerical analysis included Finite Element analysis of Continuum Soil (called as FEM Model). Basically the Coupled analysis includes analysis of both structure and soil at a time. Thus in general, structural * Gaurav D. Dhadse [email protected] 1
Department of Civil Engineering, National Institute of Technology, Raipur 492010, India
members are modeled as skeletal whereas soil may be modeled either skeletal spring or continuum. Early stage investigation of SSI analysis starts in 1867 by Winkler’s, called as ‘Winkler Model’. After this, various forms of soil idealization were discussed by two parameter model and three parameter model considering only elasticity of soil [1]. Some n
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