Evaluation of seismic response of bridges under asynchronous excitation and comparisons with Eurocode 8-2 provisions

Anastasios G. Sextos, Andreas J. Kappos

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

44 Citations (Scopus)

Abstract

The paper aims to evaluate the way Eurocode 8 treats the consideration of asynchronous earthquake ground motion during the seismic design of bridges, and to discuss alternative solutions for cases wherein existing provisions do not lead to satisfactory results. The evaluation of EC8-2 new provisions and simplified methods is performed through comparison with a more refined approach whereas an effort is made to quantitatively assess the relative importance of various design and analysis assumptions that have to be made when spatial variability of ground motion is taken into consideration, based on the study of the dynamic response of 27 different bridges. It is concluded that, despite the complexity of the problem, there are specific cases where EC8 provisions can be safely and easily applied in practice, while in other cases ignoring the effect of asynchronous excitation or performing simplified calculations can significantly underestimate the actual seismic demand.

Original languageEnglish
Pages (from-to)519-545
Number of pages27
JournalBulletin of Earthquake Engineering
Volume7
Issue number2
DOIs
Publication statusPublished - May 2009

Keywords

  • Bridges
  • Earthquakes
  • Ground motion
  • Seismic design
  • Spatial variability

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