Soil–structure interaction analysis of a FPS-isolated structure using finite element model

Krishnamoorthy, Agrahara and Anita, S (2016) Soil–structure interaction analysis of a FPS-isolated structure using finite element model. Structures, 5. pp. 44-57. ISSN 2352-0124

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Abstract

A numerical model for the seismic analysis of a structure isolatedwith friction pendulumsystem(FPS) considering soil structure interaction (SSI) is developed. In the analysis, the soil is considered as an elastic continuumand is modeled using finite element method. Three degrees of freedom (two translational and one rotational) are considered for the structure whereas the soil is modeled using plane strain element with two translational degrees of freedom. Sliding and non-sliding phases of FPS are modeled using a fictitious spring. Effects of considering soil structure interaction on a multi-degree-freedom structure isolated with friction pendulum system is investigated using the proposed method. A parametric study is also carried out to investigate the influence of flexibility of soil, type of earthquakes, frequency content of earthquake ground motions, friction coefficient of sliding material, isolation time period, number of floors and the time period of fixed base structure on the response of isolated structure with SSI. The results of the numerical study show that the SSI affects the response of the structure isolated with FPS and in many cases, the response of the structure increases due to SSI.

Item Type: Article
Uncontrolled Keywords: Sliding bearing; Friction pendulum system; Soil structure interaction; Finite element method;ear
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 15 Jul 2016 15:23
Last Modified: 15 Jul 2016 15:23
URI: http://eprints.manipal.edu/id/eprint/146579

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