Geomechanics and Engineering

  • 제9권2호
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  • Pages.125-144
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  • 2015
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Seismic microzonation of Kolkata

  • Shiuly, Amit (Department of Civil Engineering, Jalpaiguri Govt Engg College) ;
  • Sahu, R.B. (Department of Civil Engineering, Jadavpur University) ;
  • Mandal, Saroj (Department of Civil Engineering, Jadavpur University)
  • 투고 : 2014.08.14
  • 심사 : 2015.04.03
  • 발행 : 2015.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the probabilistic seismic microzonation of densely populated Kolkata city, situated on the world's largest delta island with very soft alluvial soil deposit. At first probabilistic seismic hazard analysis of Kolkata city was carried out at bedrock level and then ground motion amplification due to sedimentary deposit was computed using one dimensional (1D) wave propagation analysis SHAKE2000. Different maps like fundamental frequency, amplification at fundamental frequency, peak ground acceleration (PGA), peak ground velocity (PGV), peak ground displacement (PGD), maximum response spectral acceleration at different time period bands are developed for variety of end users, structural and geotechnical engineers, land use planners, emergency managers and awareness of general public. The probabilistically predicted PGA at bedrock level is 0.12 g for 50% exceedance in 50 years and maximum PGA at surface level it varies from 0.095 g to 0.18 g for same probability of exceedance. The scenario of simulated ground motion revealed that Kolkata city is very much prone to damage during earthquake.

키워드

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