Extension of modal pushover analysis to seismic assessment of bridges

T. S. Paraskeva, A. J. Kappos*, A. G. Sextos

*Corresponding author for this work

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

95 Citations (Scopus)

Abstract

Nonlinear static (pushover) analysis has become a popular tool during the last decade for the seismic assessment of buildings. Nevertheless, its main advantage of lower computational cost compared to nonlinear dynamic time-history analysis (THA) is counter-balanced by its inherent restriction to structures wherein the fundamental mode dominates the response. Extension of the pushover approach to consider higher modes effects has attracted attention, but such work has hitherto focused mainly on buildings, while corresponding work on bridges has been very limited. Hence, the aim of this study is to adapt the modal pushover analysis procedure for the assessment of bridges, and investigate its applicability in the case of an existing, long and curved, bridge, designed according to current seismic codes; this bridge is assessed using three nonlinear static analysis methods, as well as THA. Comparative evaluation of the calculated response of the bridge illustrates the applicability and potential of the modal pushover method for bridges, and quantifies its relative accuracy compared to that obtained through other inelastic methods.

Original languageEnglish
Pages (from-to)1269-1293
Number of pages25
JournalEarthquake Engineering and Structural Dynamics
Volume35
Issue number10
DOIs
Publication statusPublished - Aug 2006

Keywords

  • Bridges
  • Modal pushover
  • Seismic design

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