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.
Simplified analytical model for flexural response of external R.C. frames with smooth rebars / Campione, Giuseppe; Cannella, Francesco; Cavaleri, Liborio; Monaco, Alessia. - In: STRUCTURAL ENGINEERING AND MECHANICS. - ISSN 1225-4568. - ELETTRONICO. - 66:4(2018), pp. 531-542.
|Titolo:||Simplified analytical model for flexural response of external R.C. frames with smooth rebars|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.12989/sem.2018.66.4.531|
|Appare nelle tipologie:||1.1 Articolo in rivista|