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Structural Engineering and Mechanics
  Volume 66, Number 4, May25 2018, pages 531-542
DOI: http://dx.doi.org/10.12989/sem.2018.66.4.531
 


Simplified analytical model for flexural response of external R.C. frames with smooth rebars
Giuseppe Campione, Francesco Cannella, Liborio Cavaleri and Alessia Monaco

 
Abstract
    In this paper an analytical model in a closed form able to reproduce the monotonic flexural response of external RC beam-column joints with smooth rebars is presented. The column is subjected to a constant vertical load and the beam to a monotonically increasing lateral force applied at the tip. The model is based on the flexural behavior of the beam and the column determined adopting a concentrated plasticity hinge model including slippage of the main reinforcing bars of the beam. A simplified bilinear moment-axial force domain is assumed to derive the ultimate moment associated with the design axial force. For the joint, a simple truss model is adopted to predict shear strength and panel distortion. Experimental data recently given in the literature referring to the load-deflection response of external RC joints with smooth rebars are utilized to validate the model, showing good agreement. Finally, the proposed model can be considered a useful instrument for preliminary static verification of existing external RC beam-column joints with smooth rebars for both strength and ductility verification.
 
Key Words
    joint; beam; column; shear; flexure; smooth rebars
 
Address
Giuseppe Campione, Francesco Cannella, Liborio Cavaleri and Alessia Monaco: Department of Civil, Environmental, Aerospace and Material Engineering (DICAM) - University of Palermo,
Viale delle Scienze, 90128 Palermo, Italy
 

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