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Study of role of basin shape in the site–city interaction effects on the ground motion characteristics

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  • D. Sahar
  • J. Narayan
  • Neeraj Kumar

Abstract

In this paper, the role of basin shape in the site–city interaction (SCI) effects on the ground motion characteristics is documented. The effects of city type and city density on the free-field motion are also documented. The seismic responses of various 2D basin models with different shapes as well as city type and city density were simulated using a fourth-order accurate staggered-grid viscoelastic SH-wave finite-difference algorithm. The analysis of simulated responses of various site–city models, ground motion perturbations and spectral amplifications revealed that basin shape plays an important role in SCI effects on the ground motion. Further, a considerable SCI effect was obtained at the double resonance. The city density seems to be a more prominent parameter of SCI, which largely reduces the ground motion amplitude in the city as compared to the height of buildings. It was also inferred that the existence of different types of buildings may result in a decrease in coherency of building response. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • D. Sahar & J. Narayan & Neeraj Kumar, 2015. "Study of role of basin shape in the site–city interaction effects on the ground motion characteristics," 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. 75(2), pages 1167-1186, January.
    • Handle: RePEc:spr:nathaz:v:75:y:2015:i:2:p:1167-1186
    DOI: 10.1007/s11069-014-1366-2
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    Citations

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    Cited by:

    1. J. P. Narayan & Kamal, 2018. "A scenario of ground shaking hazard in intracratonic circular basins developed by basin-generated surface waves: an earthquake engineering perspective," 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. 92(3), pages 1841-1857, July.
    2. D. Sahar & J. P. Narayan, 2016. "Quantification of modification of ground motion due to urbanization in a 3D basin using viscoelastic finite-difference modelling," 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. 81(2), pages 779-806, March.
    3. Neeraj Kumar & J. P. Narayan, 2019. "Effects of site–city interaction and polarization of the incident S-wave on the transfer function and fundamental frequency of structures," 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. 97(2), pages 747-774, June.
    4. D. Sahar & J. Narayan, 2016. "Quantification of modification of ground motion due to urbanization in a 3D basin using viscoelastic finite-difference modelling," 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. 81(2), pages 779-806, March.

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