Seismic site response of shallow sites in moderate seismicity regions

Menzer Pehlivan, Duhee Park, Shamsher Sadiq, Youssef M.A. Hashash

Research output: Contribution to conferencePaperpeer-review

Abstract

Seismic site response is highly dependent on local soil conditions that significantly influence amplification and attenuation of rock motions during a seismic event. Local site effects have been studied extensively in regions of high seismicity, low impedance contrast, and deep soil profiles. In moderate seismicity regions, rock motions with low intensity, short duration, and high frequency content might experience significant short period amplification while propagating through shallow sites with high impedance contrast. Building code-based site factors and design spectra may not accurately capture such short period amplification in moderate seismicity regions such as Korea, thus may lead to non-representative seismic site response estimates. This paper presents the results of numerical simulations of seismic site response of shallow soil sites (<30m) with high impedance contrast in moderate seismicity regions. Seismic site response is computed through series of equivalent linear and nonlinear analyses performed for four representative shallow sites from Korea for moderate seismicity events. This paper compares the computed seismic site response with building code-based design estimates and discusses potential implications of observed differences on design practice.

Original languageEnglish (US)
Pages1569-1572
Number of pages4
StatePublished - 2017
Event19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of
Duration: Sep 17 2017Sep 22 2017

Other

Other19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017
Country/TerritoryKorea, Republic of
CitySeoul
Period9/17/179/22/17

Keywords

  • Equivalent-linear and nonlinear site response analyses
  • High-impedance contrast
  • Moderate seismicity
  • Shallow sites

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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