Wave passage and ground motion incoherency effects on seismic response of an extended bridge

Aman M. Mwafy, Oh Sung Kwon, Amr Elnashai, Youssef M.A. Hashash

Research output: Contribution to journalReview articlepeer-review

18 Citations (Scopus)


This paper investigates the implications of ground motion spatial variability on the seismic response of an extended highway bridge. An existing 59-span, 2,164-meter bridge with several bearing types and irregularity features was selected as a reference structure. The bridge is located in the New Madrid Seismic Zone and supported on thick layers of soil deposits. Site-specific bedrock input ground motions were selected based on a refined probabilistic seismic hazard analysis of the bridge site. Wave passage and ground motion incoherency effects were accounted for after propagating the bedrock records to the ground surface. The results obtained from inelastic response-history analyses confirm the significant impact of wave passage and ground motion incoherency on the seismic behavior of the bridge. The amplification in seismic demands exceeds 150%, whereas the maximum suppression of these demands is less than 50%. The irregular and unpredictable changes in structural response owing to asynchronous earthquake records necessitate in-depth seismic assessment of major highway bridges with advanced modeling techniques to realistically capture their complex seismic response.

Original languageEnglish
Pages (from-to)364-374
Number of pages11
JournalJournal of Bridge Engineering
Issue number3
Publication statusPublished - May 2011


  • Extended highway bridges
  • Ground motion incoherence
  • Inelastic dynamic analysis
  • Seismic assessment
  • Site effects
  • Wave passage

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


Dive into the research topics of 'Wave passage and ground motion incoherency effects on seismic response of an extended bridge'. Together they form a unique fingerprint.

Cite this