Experimental study of reinforced concrete bridge columns subjected to near-fault ground motions

Hoon Choi*, M. Saiid Saiidi, Paul Somerville, Saad El-Azazy

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Recorded fault normal, near-fault earthquakes typically exhibit a high-velocity pulse due to the superposition of S-waves. Shake table tests were conducted to investigate theeffects of near-fault ground motions on the seismic performance of bridge columns thatare designed for near-fault earthquakes. Four large-scale reinforced concrete circularcolumns with different initial periods were tested The design spectra included the current California Department of Transportation spectrum and a new spectrum developed inthis study. The most distinct measured column response was the relatively large residual displacements even under moderate levels of motion. The shake table test results revealed that it is necessary to control residual displacement at the design stage. Thedata also showed that the plastic hinge length in sufficiently confined columns subjected to near-fault earthquakes is comparable to that of columns experiencing far- field motions.

Original languageEnglish
Pages (from-to)3-12
Number of pages10
JournalACI Structural Journal
Volume107
Issue number1
Publication statusPublished - Jan 2010
Externally publishedYes

Keywords

  • Bridge column
  • Dynamic response
  • Near-fault ground motion
  • Reinforced concrete
  • Residual displacement

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