Research Article
May 1981
Statistical Study of Uniform Cycles in Earthquakes
Publication: Journal of the Geotechnical Engineering Division
Volume 107, Issue 5
Abstract
The applicability of equivalent uniform stress cycles in soil dynamics to the study of soil behavior during and after an earthquake is explored. The actual irregular time histories produced by an earthquake can be represented by uniform amplitude cyclic stresses, although there may be a considerable amount of uncertainty associated with them. The stress level of 75 percent of the maximum is suggested for such conversion, since in this case the uncertainty in the normalized soil-strength curve has a minimum effect on the value of the Neq versus M relationship. A statistical relationship between Neq and the earthquake magnitude is proposed here based on results available in the literature. The Neq could be estimated adequately by considering the component of excitation containing the peak acceleration. The Neq versus M relationship proposed is somewhat different from the relationship suggested by Seed and Idriss. This discrepancy in Neq values may not yield significant differences in estimating the soil strength in a liquefaction study.
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Published In
Journal of the Geotechnical Engineering Division
Volume 107 • Issue 5 • May 1981
Pages: 577 - 589
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: May 1981
Published online: Feb 11, 2021
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Achintya Haldar, M.ASCE
Asst. Prof., School of Civ. Engrg., Georgia Inst. of Tech., Atlanta, Ga. 30332
Wilson H. Tang, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill. 61801
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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.