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Faculty of Civil and Geodetic Engineering, Ljubljana (FGGLJ)
  • Applicability of pushover methods for the seismic analysis of single-column bent viaducts
    Isaković, Tatjana ; Popeyo Lazaro, Mauro Nino ; Fischinger, Matej
    n overview of the applicability of a typical single-mode pushover method (the N2 method) and twotypical multi-mode pushover methods (the modal pushover analysis (MPA) and incremental responsespectrum ... analysis (IRSA) methods) for the analysis of single column bent viaducts in the transversedirection is presented. Previous research, which was limited to relatively short viaducts supported by fewcolumns, has been extended to longer viaducts with more bents.The single-mode N2 method is accurate enough for bridges where the effective modal mass of thefundamental mode is at least 80% of the total mass. The applicability of this method depends on (a) theratio of the stiffness of the superstructure to that of the bents and (b) the strength of the bents. In shortbridges with few columns, the accuracy of the N2 method increases as the seismic intensity increases,whereas in long viaducts (e.g. viaducts with lengths greater than 500 m) the method is in general lesseffective.In the case of the analyzed moderately irregular long viaducts, which are common in constructiondesign practice, the MPA method performed well. For the analysis of bridges where the modes changesigni%cantly, depending on the seismic intensity, the IRSA method is in principle more appropriate, unlessa viaduct is torsionally sensitive. In such cases, all simpli%ed methods should be used with care.
    Source: Earthquake engineering & structural dynamics. - ISSN 0098-8847 (Letn. 37, št. 8, 2008, Str. 1185-1202)
    Type of material - article, component part ; adult, serious
    Publish date - 2008
    Language - english
    COBISS.SI-ID - 4008033

    Link(s):

    http://www3.interscience.wiley.com/cgi-bin/fulltext/118720765/PDFSTART
    https://repozitorij.uni-lj.si/IzpisGradiva.php?id=132865
    DOI

source: Earthquake engineering & structural dynamics. - ISSN 0098-8847 (Letn. 37, št. 8, 2008, Str. 1185-1202)

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