Evaluation of seismic site factors in the Mississippi Embayment. II. Probabilistic seismic hazard analysis with nonlinear site effects

Duhee Park, Youssef M A Hashash

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

An integrated probabilistic seismic hazard analysis procedure that incorporates nonlinear site effects, PSHA-NL, is developed and used to characterize the influence of thick deposits of the upper Mississippi Embayment (ME) on seismic site coefficients. PSHA-NL follows the methodology of the 2002 USGS hazard maps and generates a compatible set of ground motion records. The motions are propagated using nonlinear and equivalent linear site response analyses and ME properties developed in a companion paper and used to derive surface uniform hazard response spectra. A set of generic site coefficients are derived and summarized in a format similar to NEHRP site coefficients, with an added dimension of ME deposits thickness to the Paleozoic rock, a physically meaningful impedance boundary. These coefficients compare well with NEHRP site coefficients for 30 m profiles. For thicker soil profiles, developed site coefficients are lower at short periods and higher at long periods than NEHRP site coefficients.

Original languageEnglish
Pages (from-to)145-156
Number of pages12
JournalSoil Dynamics and Earthquake Engineering
Volume25
Issue number2
DOIs
StatePublished - 2005 Feb 1

Fingerprint

site effect
seismic hazard
Hazards
hazard
Deposits
ground motion
soil profile
Paleozoic
methodology
Rocks
rock
Soils
evaluation
analysis

Keywords

  • Deep soils
  • Nonlinear site response
  • Probabilistic seismic hazard analysis
  • Site coefficients
  • Site effects

Cite this

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Evaluation of seismic site factors in the Mississippi Embayment. II. Probabilistic seismic hazard analysis with nonlinear site effects. / Park, Duhee; Hashash, Youssef M A.

In: Soil Dynamics and Earthquake Engineering, Vol. 25, No. 2, 01.02.2005, p. 145-156.

Research output: Contribution to journalArticle

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