Time History Analysis of the Base Isolated Steel Structure

International Journal of Civil Engineering

© 2017 by SSRG - IJCE Journal

Volume 4 Issue 6

Year of Publication : 2017

Authors : Fasil Mohi ud Din, Pavitra.C, Dr. M.Muthukumar

10.14445/23488352/IJCE-V4I6P103

How to Cite?

Fasil Mohi ud Din, Pavitra.C, Dr. M.Muthukumar, "Time History Analysis of the Base Isolated Steel Structure," SSRG International Journal of Civil Engineering, vol. 4,  no. 6, pp. 15-26, 2017. Crossref, https://doi.org/10.14445/23488352/IJCE-V4I6P103

Abstract:

In this research paper the main part of study was to check the response of the base isolation of the steel structure under time history analysis. Base isolation is one of the most widely accepted seismic protection systems used in structures in earthquake prone areas. The base isolation system separates the structure from its foundation and primarily moves it relative to that of the upper structure. The aim of this study is to reduce the base shear and story drifts due to earthquake ground excitation, applied to the superstructure of the building by installing base isolation devices at the foundation level and then to compare the different performances between the fixed base condition and base-isolated condition. In this study, the (G+9) unsymmetrical steel. Structure is used as test model. Friction base isolator is used as isolation system in this study. Nonlinear time history analysis is used on both of fixed base and base isolated structure. The comparative study of the acceleration, displacement and base shear was carried out for both fixed base and base isolated structure. It is found that the displacement is increased with period of the structure in case of base isolated structure and the acceleration is reduced and vice versa.

Keywords:

Displacement, base shear, acceleration, base isolation, nonlinear time history analysis, friction base isolator.

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