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A peak acceleration threshold for soil liquefaction: lessons learned from the 2012 Emilia earthquake (Italy)

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  • Filippo Santucci de Magistris
  • Giovanni Lanzano
  • Giovanni Forte
  • Giovanni Fabbrocino

Abstract

National and international seismic codes and recommendations provide criteria for liquefaction exclusion based on a peak ground acceleration (PGA) threshold value. In this paper, after a brief review of the procedures and the values suggested in those documents, a database of liquefaction case histories was created, exploiting the background data used in the most relevant verification charts, currently employed in research and professional practice. This dataset was used to identify, on the basis of simple statistical analyses, a PGA threshold on the free ground surface below which liquefaction is unlikely to occur, regardless of the geological site conditions. The calculated value, which is on the order of 0.07–0.1 g, based on the model employed to fit the data, was analyzed in light of information collected during the 2012 Emilia seismic sequence in Italy, which produced many liquefaction events triggered by low acceleration values. The case history of the Emilia earthquake advises setting a PGA threshold for code and recommendations at the lower probability level of occurrence, in the order of 1 %. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • Filippo Santucci de Magistris & Giovanni Lanzano & Giovanni Forte & Giovanni Fabbrocino, 2014. "A peak acceleration threshold for soil liquefaction: lessons learned from the 2012 Emilia earthquake (Italy)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(2), pages 1069-1094, November.
    • Handle: RePEc:spr:nathaz:v:74:y:2014:i:2:p:1069-1094
    DOI: 10.1007/s11069-014-1229-x
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    References listed on IDEAS

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    1. Yu Huang & Miao Yu, 2013. "Review of soil liquefaction characteristics during major earthquakes of the twenty-first century," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 65(3), pages 2375-2384, February.
    2. Lanzano, Giovanni & Salzano, Ernesto & de Magistris, Filippo Santucci & Fabbrocino, Giovanni, 2013. "Seismic vulnerability of natural gas pipelines," Reliability Engineering and System Safety, Elsevier, vol. 117(C), pages 73-80.
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    Cited by:

    1. Jianming Guo, 2022. "Sand liquefaction during the 2021 M 7.4 Maduo earthquake, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(3), pages 3359-3375, December.
    2. R. Sivakumar & Snehasish Ghosh, 2017. "Determination of threshold energy for the development of seismic energy anomaly model through integrated geotectonic and geoinformatics approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 86(2), pages 711-740, March.

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