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Liquefaction resistance evaluation of soils using artificial neural network for Dhaka City, Bangladesh

Author

Listed:
  • Abul Kashem Faruki Fahim

    (University of Dhaka)

  • Md. Zillur Rahman

    (University of Dhaka)

  • Md. Shakhawat Hossain

    (University of Dhaka)

  • A. S. M. Maksud Kamal

    (University of Dhaka)

Abstract

Soil liquefaction resistance evaluation is an important site investigation for seismically active areas. To minimize the loss of life and property, liquefaction hazard analysis is a prerequisite for seismic risk management. Liquefaction potential index (LPI) is widely used to determine the severity of liquefaction quantitatively and spatially. LPI is estimated from the factor of safety of liquefaction that is the ratio of cyclic resistance ratio (CRR) to cyclic stress ratio calculated applying simplified procedure. Artificial neural network (ANN) algorithm has been used in the present study to predict CRR directly from the normalized standard penetration test blow count (SPT-N) and near-surface shear wave velocity (Vs) data of Dhaka City. It is observed that ANN models have generated accurate CRR data. Three liquefaction hazard zones are identified in Dhaka City on the basis of the cumulative frequency (CF) distribution of the LPI of each geological unit. The liquefaction hazard maps have been prepared for the city using the liquefaction potential index (LPI) and its cumulative frequency (CF) distribution of each liquefaction hazard zone. The CF distribution of the SPT-N based LPI indicates that 15%, 53%, and 69% of areas, whereas the CF distribution of the Vs based LPI indicates that 11%, 48%, and 62% of areas of Zone 1, 2, and 3, respectively, show surface manifestation of liquefaction for an earthquake of moment magnitude, Mw 7.5 with a peak horizontal ground acceleration of 0.15 g.

Suggested Citation

  • Abul Kashem Faruki Fahim & Md. Zillur Rahman & Md. Shakhawat Hossain & A. S. M. Maksud Kamal, 2022. "Liquefaction resistance evaluation of soils using artificial neural network for Dhaka City, Bangladesh," 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. 113(2), pages 933-963, September.
    • Handle: RePEc:spr:nathaz:v:113:y:2022:i:2:d:10.1007_s11069-022-05331-w
    DOI: 10.1007/s11069-022-05331-w
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    References listed on IDEAS

    as
    1. Md. Zillur Rahman & Sumi Siddiqua & A. S. M. Maksud Kamal, 2020. "Seismic source modeling and probabilistic seismic hazard analysis for Bangladesh," 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. 103(2), pages 2489-2532, September.
    2. Md. Zillur Rahman & Sumi Siddiqua & A. S. M. Maksud Kamal, 2021. "Site response analysis for deep and soft sedimentary deposits of Dhaka City, Bangladesh," 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. 106(3), pages 2279-2305, April.
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