Research Article
Dec 1977
Nonstationary Seismic Response of Light Equipment
Publication: Journal of the Engineering Mechanics Division
Volume 103, Issue 6
Abstract
A method is developed to obtain floor spectra curves that include the effect of nonstationarity of seismic motions. Such spectra are usually required for design or qualification of light secondary systems such as piping and equipment. The response of a simple structure-equipment system is examined for excitations modeled by Gaussian shot-noise and filtered shot-noise. The Markov vector approach is used to obtain the time-dependent second moments of the response in closed form. The nonstationarity due to time-varying intensity of the excitation and also due to the zero-starting condition is considered. The effects of various seismic intensity modulation functions and structural parameters on the response are evaluated. Useful results of practical importance are obtained in terms of response ratios of nonstationary-to-stationary responses, and their application in the generation of floor spectra curves for a structure is illustrated.
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Published In
Journal of the Engineering Mechanics Division
Volume 103 • Issue 6 • December 1977
Pages: 1035 - 1048
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Dec 1977
Published online: Feb 3, 2021
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Authors
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Mahendra P. Singh, M.ASCE
Assoc. Prof., Dept. of Engrg. Sci. and Mechanics, Virginia Polytechnic Inst. and State Univ., Blacksburg, Va.; formerly, Sr. Engrg. Analyst, Sargent & Lundy, Chicago, Ill.
Yi-Kwei Wen, M.ASCE
Assoc. Prof. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.