Closure to "Modeling Reinforced-Concrete Beam-Column Joints Subjected to Cyclic Loading" by Laura N. Lowes and Arash Altoontash

In this closure article, the researchers reply to a commentary (LaFave and Shin, June 2005) on their research in which a model was developed to represent the response of reinforced concrete (RC) beam-column joints under reversed-cyclic loading (Lowes and Altoontash, December 2003). Their proposed model provides a simple representation of primary inelastic mechanisms that determine joint behavior: failure of the joint core under shear loading and anchorage failure of beam and column longitudinal reinforcement embedded in the joint. The discussion authors argued that the proposed constitutive model for the joint shear panel component of the reinforced concrete (RC) beam-column connection element presented by the authors in their paper may actually work quite well up to fairly high levels of joint shear demand (for well-detailed joints with adequate transverse reinforcement). However, they expressed concern that the model may not work nearly as well (possibly erroneously predicting joint failure at even moderate joint shear demands) for joints that are not necessarily well detailed with sufficient transverse reinforcement. Finally, the discussers were very much in agreement with the authors that proper robust simulation of RC frame response to seismic loading should include some sort of explicit treatment of inelastic joint effects on both stiffness and strength. In this closure, Lowes et al agree with the discussers that it is critical to establish the range of joint design parameters for which application of the modified compression field theory (MCFT) is appropriate.

  • Availability:
  • Authors:
    • Lowes, Laura N
    • Altoontash, Arash
    • Mitra, Nilanjan
  • Publication Date: 2005-6


  • English

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  • Accession Number: 01001869
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 5 2005 1:55PM