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Extraction of Isfahan’s Seismic Geotechnical Model Using Ambient Noise and Numerical Modeling

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Abstract

A preliminary seismic geotechnical model of Isfahan is extracted using advanced microtremor measurements as well as 2D site response analysis. Single-station microtremor measurements were performed at 25 stations throughout the study area and analyzed using the H/V method as well as the concept of ellipticity of Rayleigh waves. Seismic microzonation maps including the distribution of natural site period, depth to seismic bedrock as well as the soil type throughout the study area were extracted, providing a useful basis for land-use planning in Isfahan. The shear wave velocity of sub-surface soil layers varies from less than 250 m/s near the ground surface to more than 1200 m/s throughout the study area. In the northern districts, the depth of seismic bedrock may exceed 100 m. The natural site period varies from less than 0.5 to more than 1.0 s throughout the study area. It increases from south to north, whereas in the E–W direction, the changes are much less.

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Notes

  1. Preliminary Determination of Epicenters.

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Acknowledgement

This research was performed as a part of PhD thesis of the author.

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Correspondence to M. Kamalian.

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Hashemifesharaki, H., Haghshenas, E., Kamalian, M. et al. Extraction of Isfahan’s Seismic Geotechnical Model Using Ambient Noise and Numerical Modeling. Int J Civ Eng 18, 797–815 (2020). https://doi.org/10.1007/s40999-020-00503-w

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  • DOI: https://doi.org/10.1007/s40999-020-00503-w

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