TECHNICAL PAPERS
Oct 1, 2008

Experimental Investigations on the Seismic Response of a Base-Isolated Reinforced Concrete Frame Model

Publication: Journal of Performance of Constructed Facilities
Volume 22, Issue 5

Abstract

The existing knowledge based on the physical characteristics of rubber-based seismic isolators and the validity of assumptions involved in design can be strengthened with shake table tests and field monitoring during earthquakes. Existing structures can be retrofitted with seismic isolators and successful examples are coming up day by day. This paper presents the results of analytical and experimental investigations of a one-third scaled model of a reinforced concrete soft first-storied structure mounted on natural rubber-based isolators and subjected to uniaxial seismic motion. Translational and rocking responses of the scaled model were measured under four different synthetic time histories, covering a wide range of frequencies. Through base isolation, the time period of the horizontal mode is far removed from the peak spectrum but the rocking modes may well be entrapped in the peak region. Hence, a simplified fail-safe system for protection against overturning was also studied.

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References

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Published In

Go to Journal of Performance of Constructed Facilities
Journal of Performance of Constructed Facilities
Volume 22Issue 5October 2008
Pages: 289 - 296

History

Received: Jan 17, 2007
Accepted: Dec 27, 2007
Published online: Oct 1, 2008
Published in print: Oct 2008

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Authors

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N. Lakshmanan
Director, Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai 600113, India.
K. Sathish Kumar
Scientist, Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai 600113, India.
R. Sreekala
Scientist, Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai 600113, India.
K. Muthumani
Scientist, Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai 600113, India.
J. Guru
Student, College of Engineering, Anna Univ., Chennai 600025, India.
N. Gopalakrishnan [email protected]
Scientist, Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai 600113, India (corresponding Author) E-mail: [email protected]

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