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Effect of Isolation Damping on the Response of Base Isolated Structure

Krishnamoorthy, Agrahara and Shetty, Kiran Kumar (2009) Effect of Isolation Damping on the Response of Base Isolated Structure. Asian Journal of Civil Engineering (Building and Housing), 10 (6). pp. 701-716. ISSN 1563-0854

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Abstract

The response of a multi-story space frame structure resting on non-linear base isolation system, subjected to bi-directional harmonic and seismic ground motions are studied. A four-storey space frame structure with consistent mass system having six degrees of freedom (three translations along x, y, z-axes and three rotations about these axes) at each node is considered for study. The effect of isolation damping and the excitation frequency on the response of a base isolated structure is investigated. The effect of excitation frequency,isolation period, superstructure time period and superstructure damping on the optimum isolation damping is also studied in this paper. It is shown that the above parameters have significant effects on optimum isolation damping. The response of isolated system is found to be less in comparison to the corresponding response without isolation system, implying that the isolation is effective in reducing acceleration and forces of the system.

Item Type: Article
Uncontrolled Keywords: Non-linear base isolation system; time period of superstructure; isolation period; optimum isolation damping; superstructure damping, bi–directional ground motion
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 19 Oct 2011 09:54
Last Modified: 23 Jul 2013 07:08
URI: http://eprints.manipal.edu/id/eprint/1531

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