STATISTICAL STUDY OF UNIFORM CYCLES IN EARTHQUAKES

Achintya Haldar, Wilson H. Tang

Research output: Contribution to journalArticle

16 Citations (Scopus)

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 N//S//e//q versus M relationship. A statistical relationship between N//S//e//q and the earthquake magnitude is proposed here based on results available in the literature. The N//S//e//q could be estimated adequately by considering the component of excitation containing the peak acceleration. The N//S//e//q versus M relationship proposed is somewhat different from the relationship suggested by Seed and Idriss. This discrepancy in N//S//e//q values may not yield significant differences in estimating the soil strength in a liquefaction study.

Original languageEnglish (US)
Pages (from-to)577-589
Number of pages13
JournalJournal of the Geotechnical Engineering Division
Volume107
Issue number5
StatePublished - May 1981
Externally publishedYes

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Earthquakes
soil strength
Soils
earthquake
peak acceleration
soil dynamics
earthquake magnitude
liquefaction
Liquefaction
seed
Seed
history
soil
Uncertainty
effect

ASJC Scopus subject areas

  • Engineering(all)
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

STATISTICAL STUDY OF UNIFORM CYCLES IN EARTHQUAKES. / Haldar, Achintya; Tang, Wilson H.

In: Journal of the Geotechnical Engineering Division, Vol. 107, No. 5, 05.1981, p. 577-589.

Research output: Contribution to journalArticle

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