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Critical earthquake input power spectral density function models for engineering structures

Manohar, CS and Sarkar, Abhijit (1995) Critical earthquake input power spectral density function models for engineering structures. In: Earthquake Engineering & Structural Dynamics, 24 (12). pp. 1549-1566.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/eqe.429...


The problem of determining optimal power spectral density models for earthquake excitation which satisfy constraints on total average power, zero crossing rate and which produce the highest response variance in a given linear system is considered. The solution to this problem is obtained using linear programming methods. The resulting solutions are shown to display a highly deterministic structure and, therefore, fail to capture the stochastic nature of the input. A modification to the definition of critical excitation is proposed which takes into account the entropy rate as a measure of uncertainty in the earthquake loads. The resulting problem is solved using calculus of variations and also within linear programming framework. Illustrative examples on specifying seismic inputs for a nuclear power plant and a tall earth dam are considered and the resulting solutions are shown to be realistic.

Item Type: Journal Article
Publication: Earthquake Engineering & Structural Dynamics
Publisher: John Wiley and Sons
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 15 Jun 2011 09:08
Last Modified: 15 Jun 2011 09:08
URI: http://eprints.iisc.ac.in/id/eprint/37436

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