Fragility analysis of a highway over-crossing bridge with consideration of soil-structure interactions

Oh Sung Kwon, Amr S. Elnashai

Research output: Contribution to journalArticlepeer-review

68 Citations (SciVal)

Abstract

Seismic fragility relationships, including the soil-structure interaction (SSI) of a common bridge configuration in central and eastern USA, are derived in this study. Four different modelling methods are adopted to represent abutments and foundations of the bridge, namely, (a) fixed abutments and foundations, (b) lumped springs developed from conventional pile analysis of piles at abutments and foundations, (c) lumped springs developed from three-dimensional finite element (3D FE) analysis of abutments and foundations and (d) 3D FE models. Seismic demand on the bridge components is estimated from inelastic response history analysis of the SSI systems. Finally, fragility curves of the components and bridge system are derived. The four different SSI approaches result in different seismic fragility. The implication of this work is that careful consideration is necessary when selecting an analytical representation of a soil and foundation system to obtain reliable earthquake impact assessment. In addition, it is found that abutment bearings are the most critical components for the studied bridge configuration.

Original languageEnglish (US)
Pages (from-to)159-178
Number of pages20
JournalStructure and Infrastructure Engineering
Volume6
Issue number1-2
DOIs
StatePublished - Feb 2010

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering
  • Mechanical Engineering

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