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Structural Engineering and Mechanics Volume 66, Number 4, May25 2018 , pages 531-542 DOI: https://doi.org/10.12989/sem.2018.66.4.531 |
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Simplified analytical model for flexural response of external R.C. frames with smooth rebars |
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Giuseppe Campione, Francesco Cannella, Liborio Cavaleri and Alessia Monaco
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| 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 | ||