Nonlinear dynamic behaviour of severely corroded reinforced concrete columns: shaking table study

Xiao Ge, Matthew S. Dietz, Nicholas A. Alexander, Mohammad M. Kashani*

*Corresponding author for this work

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

5 Citations (Scopus)
66 Downloads (Pure)

Abstract

A set of benchmark, medium scale, shaking table tests on corroded reinforced concrete (RC) columns is conducted with the aim of investigating the effects of corrosion damage on the nonlinear dynamic behaviour of RC bridge piers. The experimental programme consists of an uncorroded control specimen and two corroded RC column specimens, with identical structural details. An accelerated corrosion procedure is used to corrode the RC columns. The uncorroded and corroded specimens are subjected to far-field long duration ground motion excitations. The two corroded columns had 51% and 65% average mass loss ratios. The testing sequence includes slight, extensive, and complete damage levels, followed by an aftershock to examine the cascade effect on the nonlinear dynamic response of the proposed RC columns. The experimental results show that corrosion changes the failure mode of the RC columns, and has a significant negative impact on the residual strength (about 50% mass loss results in about 80% strength reduction) and drift capacity of RC columns.

Original languageEnglish
Pages (from-to)1417-1443
Number of pages27
JournalBulletin of Earthquake Engineering
Volume18
Issue number4
Early online date8 Nov 2019
DOIs
Publication statusPublished - 1 Mar 2020

Keywords

  • Accelerated corrosion
  • Corrosion
  • Nonlinear dynamic response
  • Reinforced concrete column
  • Shaking table test

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