### 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% 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_{eq} versus M relationship. A statistical relationship between N_{eq} and the earthquake magnitude is proposed here based on results available in the literature. The N_{eq} could be estimated adequately by considering the component of excitation containing the peak acceleration. The N_{eq} versus M relationship proposed is somewhat different from the relationship suggested by Seed and Idriss. This discrepancy in N_{eq} values may not yield significant differences in estimating the soil strength in a liquefaction study. -from ASCE Publications Abstracts

Original language | English (US) |
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Pages (from-to) | 577-589 |

Number of pages | 13 |

Journal | Journal of the Geotechnical Engineering Division, ASCE |

Volume | 107 |

Issue number | GT5, Proc. Paper, 16239 |

State | Published - Jan 1 1981 |

Externally published | Yes |

### ASJC Scopus subject areas

- Engineering(all)

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## Cite this

*Journal of the Geotechnical Engineering Division, ASCE*,

*107*(GT5, Proc. Paper, 16239), 577-589.