Speaker: Andreas Skarlatoudis
Affiliation: AECOM

Dr. Andreas Skarlatoudis, Seismologist at AECOM, will present: “Seismic Hazard Assessment Methods including Deterministic (Scenario-Based) and Probabilistic Methods and their uses in Dam Design“.

Summary:
The key differences between probabilistic seismic hazard analysis (PSHA) and deterministic seismic hazard analysis (DSHA, preferably referred to as a scenario-based analysis) are that, unlike DSHA, PSHA takes account of the frequency of occurrence of each earthquake scenario that is considered, and fully considers the random variability (epsilon) in ground motion level.  The result of a DSHA is the ground motion at the site resulting from a single earthquake scenario (or a few scenarios) having a preselected value of epsilon (usually 0 or 1), and the annual frequency of exceedance (or return period) of this ground motion level is undefined. In contrast, the hazard curve produced by PSHA yields the mean annual rates of exceedance (or return period) for each ground motion level. The complementary nature of PSHA and DSHA is manifested in the fact that practical application of PSHA, especially using ground motion time histories, results in scenario earthquakes that resemble the products of DSHA.  Application of the period dependence of epsilon using the conditional mean spectrum (CMS) avoids the inaccurate and over conservative representation of the hazard by the uniform hazard spectrum (UHS) obtained in PSHA.

Biography:
Dr Skarlatoudis was born in Thessaloniki, Greece.

In 1994 he enrolled in the study program of the School of Physics of Aristotle University of Thessaloniki. He concluded his studies in 2000 and he was awarded with the BSc degree in Physics. The same year he entered the postgraduate study program of the School of Geology, Department of Geophysics and by the end of 2002 he has been awarded with the MSc degree in Geophysics.

In 2003 he entered the PhD program of the School of Geology, Department of Geophysics and concluded his PhD thesis with title “Strong ground motion simulation using 2D and 3D models“, which he successfully defended in 2008.

Dr Skarlatoudis worked for six years in the Seismological Station of Aristotle University of Thessaloniki, with research, administration and technical duties. Since 2012 he is employed by AECOM working mainly on site specific Probabilistic Seismic Hazard Analysis projects.

His research interests are focused on Engineering Seismology, with emphases on strong motion properties and ground motion simulation with various techniques

  • Strong motion records processing (correction procedures)
  • Study of strong motion properties (Ground motion prediction equations)
  • Strong motion records simulation (finite-difference method, stochastic method)
  • General Seismology (earthquake relocation, seismic records analysis)

Date/Time:
Date(s) - Feb 28, 2017
4:00 pm - 6:00 pm

Location:

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