Effects of stirrup and inclined bar corrosion on shear behavior of RC beams

Lei Wang, Xuhui Zhang, Jianren Zhang, Yafei Ma, Yongming Liu

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

An experimental study is proposed to investigate the shear behavior of corroded reinforced concrete (RC) beams with stirrups and inclined bars. The proposed study aims to address the effects of corrosion in the two types of shear reinforcement on the shear capacity deterioration of RC beams with low shear span-to-effective depth ratio. The accelerated corrosion test is employed to obtain different corrosion levels in stirrups and inclined bars in fourteen RC beams. The corrosion-induced concrete cracking and section damage is discussed in detail. The shear behavior including load-deformation response, residual shear strength, diagonal cracking and failure mode is presented. The shear strength of beams is predicted by a modified ACI approach considering the corrosion loss of shear reinforcement and concrete section damage. It is observed that the slight corrosion loss less than 10% in stirrups and inclined bars has little effect on the degradation of shear behavior. The severe corrosion of stirrups and inclined bars, and the accompanied concrete section damage decreases the shear strength and stiffness significantly. Corrosion of stirrups and inclined bars does not change the shear compression failure mode of beams. Severe corrosion does reduce the number of cracks in beams and lead to early rupture of shear reinforcement.

Original languageEnglish (US)
Pages (from-to)537-546
Number of pages10
JournalConstruction and Building Materials
Volume98
DOIs
StatePublished - Nov 15 2015

Keywords

  • Beam
  • Corrosion
  • Inclined bars
  • Reinforced concrete
  • Shear
  • Stirrups

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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