Computers and Concrete

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Analysis of reinforced concrete corbel beams using Strut and Tie models

  • Parol, Jafarali (Sustainability and Reliability of Infrastructures Program, Energy and Building Research Center, Kuwait Institute for Scientific Research) ;
  • Al-Qazweeni, Jamal (Sustainability and Reliability of Infrastructures Program, Energy and Building Research Center, Kuwait Institute for Scientific Research) ;
  • Salam, Safaa Abdul (Sustainability and Reliability of Infrastructures Program, Energy and Building Research Center, Kuwait Institute for Scientific Research)
  • Received : 2016.05.23
  • Accepted : 2017.11.17
  • Published : 2018.01.25
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Abstract

Reinforced concrete corbel beams (span to depth ratio of a corbel is less than one) are designed with primary reinforcement bars to account for bending moment and with the secondary reinforcement placed parallel to the primary reinforcement (shear stirrups) to resist shear force. It is interesting to note that most of the available analytical procedures employ empirical formulas for the analysis of reinforced concrete corbels. In the present work, a generalized and a simple strut and tie models were employed for the analysis of reinforced corbel beams. The models were benchmarked against experimental results available in the literature. It was shown here that increase of shear stirrups increases the load carrying capacity of reinforced concrete corbel beams. The effect of horizontal load on the load carrying capacity of the corbel beams has also been examined in the present paper. It is observed from the strut and tie models that the resistance of the corbel beam subjected to combined horizontal and vertical load did not change with increase in shear stirrups if the failure of the corbel is limited by concrete crushing. In other words, the load carrying capacity was independent of the horizontal load when failure of the beam occurred due to concrete crushing.

Keywords

Acknowledgement

Supported by : Kuwait Institute for Scientific Research (KISR)

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