The effect of rotational component of earthquake excitation on the response of steel structures

Nikos Pnevmatikos*, Foteini Konstandakopoulou, Georgios Papavasileiou, Georgios Papagiannopoulos, Pantelis Broukos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This work is on the influence of the rotational component of earthquake excitations to the response of steel structures. In most studies, seismic input is being modeled only using the translational component of the ground acceleration, while the rotational one is ignored. This was due to the observation that the rotational component had minimal effect on low-rise buildings. Hence, the accelerometers used would not measure it, leading to a lack of records. Nowadays, technology provides such instruments and relative records are made available. Indicative of that is that elastic design response spectra for rotational components are introduced to the design codes. In this paper, the results on structural response and internal forces due to the rotational component of a seismic excitation on the steel structures are examined. Dynamic time history analysis and response spectrum analysis of different steel structures are performed (a) considering the rotational component of the excitation and (b) without it. From the numerical results it is shown that the impact of rotational component in structural response and internal forces of the steel structures is significant and should not be ignored during structural design.
Original languageEnglish
Pages (from-to)1887-1892
Number of pages6
Issue number2-4
Early online date1 Sep 2021
Publication statusPublished - 30 Sep 2021
Externally publishedYes


  • rotational component
  • seismic design
  • earthquake engineering
  • steel structures
  • EC8 part 6


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