Experimental examination of ACI 318 strut and tie modeling provisions

Robin G. Tuchscherer, David B. Birrcher, Oguzhan Bayrak

Research output: Contribution to journalConference articlepeer-review


An experimental study was conducted in which 37 reinforced concrete deep beam specimens were tested. The specimens are some of the largest deep beams ever tested in the history of shear research. The data from the experimental program and from a database of 179 deep beam tests in the literature were used to assess the accuracy and conservatism of the strut and tie modeling provisions of ACI 318. In addition, the effects of the following variables were evaluated: distribution of stirrup legs across the web, triaxial confinement via concrete surrounding CCC and CCT nodal faces, quantity of web reinforcement, member depth, and a/d ratio. Based on the experimental findings of the study, suggested improvements to the ACI 318 STM provisions are discussed in this paper.

Original languageEnglish (US)
Pages (from-to)111-130
Number of pages20
JournalAmerican Concrete Institute, ACI Special Publication
Issue numberSP 296
StatePublished - 2012
EventSymposium Honoring James O. Jirsa's Contributions in Structural Concrete: A Time to Reflect at the ACI Spring 2012 Convention - Dallas, United States
Duration: Mar 18 2012Mar 22 2012


  • Deep beam shear
  • STM provisions
  • Strut and tie model

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


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