Analytical investigation on shear failure mechanism of rc t-beams with stirrups

Takuro Nakamura, Yasuhiko Sato

Research output: Contribution to journalConference articlepeer-review

Abstract

Reinforced concrete T-beam is widely used in civil engineering structures and buildings. However, the evaluation method based on the shear resistance mechanism considering the effects of the top flange area has not been established in current structural design codes. The purpose of this study is to clarify the shear failure mechanism of RC T-beams with stirrups. The shear failure behaviours of the RC T­ beams were investigated numerically with a three-dimensional nonlinear finite element method in which the width of the top flange, shear reinforcement ratio were varied. As a result, increasing in flange width of T-beam gives higher shear capacity with nonlinear relationship. The principal strain distribution and stirrups strain development of T-beams were different from the rectangular beam. In T-beams, the average shear stresses of web area in top flange were almost the same at the ultimate state, regardless of the flange width. In addition, the effect of shear reinforcement with respect to the increase of the average shear stress in flange area was not observed. The RC T-beam has a unique shear failure mechanism which is caused by T-shape cross-section and the horizontal crack.

Original languageEnglish
Pages (from-to)53-54
Number of pages2
Journalfib Symposium
Publication statusPublished - 2015
Externally publishedYes
EventInternational fib Symposium on Concrete - Innovation and Design, 2015 - Copenhagen, Denmark
Duration: 2015 May 182015 May 20

Keywords

  • 3D nonlinear FEM
  • Reinforced concrete T-bearns
  • Shear capacity
  • Shear stress
  • Stirrups

ASJC Scopus subject areas

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

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