Efficiency of alternative intensity measures for the seismic assessment of monolithic free-standing columns

Athanasios Pappas, Anastasios Sextos, Fransesca Da Porto, Claudio Modena

Research output: Contribution to journalArticle (Academic Journal)peer-review

43 Citations (Scopus)
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This paper deals with the dynamic response of a free-standing ancient column in the Roman Agora of Thessaloniki, Greece as a means to shed more light on the complex behaviour of rocking bodies under seismic excitation. Numerical analyses utilizing discrete element method were carried out with the use of multiple seismic records selected based on the disaggregation of the seismic hazard for the region of interest. To identify their impact on structural performance, earthquake Intensity Measures, such as Peak Ground Acceleration and Peak Ground Velocity are examined for the case of a column that sustained no visible permanent deformations during the Ms=6.5 Thessaloniki earthquake of 1978. The analysis revealed a weak correlation of PGA and PGV with the response results and a significant influence of the mean frequency (fm) of the seismic motion. No coupling was found between the maximum displacement of the top during the oscillation and the permanent post-seismic deformations. The complementarity of both earthquake Intensity Measures in the structural vulnerability assessment is also depicted.
Original languageEnglish
Pages (from-to)1635-1659
Number of pages25
JournalBulletin of Earthquake Engineering
Issue number4
Early online date26 Oct 2016
Publication statusPublished - Apr 2017


  • Ancient Monuments
  • Free Standing Column
  • Rocking
  • Discrete Element Method (DEM)
  • Seismic Vulnerability
  • Intensity Measures


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