Title: Proposing a simplified and parametric numerical shear stress-strain model for RC deep beams

Authors: Seyed Shaker Hashemi; Saeid Javidi; Mahmoud Malakooti

Addresses: Department of Civil Engineering, Persian Gulf University, Shahid Mahini Street, Bushehr, P.O. Box 75169-13817, Iran ' Department of Civil Engineering, Persian Gulf University, Shahid Mahini Street, Bushehr, P.O. Box 75169-13817, Iran ' Department of Civil Engineering, Persian Gulf University, Shahid Mahini Street, Bushehr, P.O. Box 75169-13817, Iran

Abstract: In this paper, the behaviour of reinforced concrete (RC) elements has been studied and a new shear stress-strain (SS-S) model is proposed for RC deep beams. Timoshenko beam theory is applied to consider the effect of shear deformations in numerical models. To take into account, the effect of bar-concrete interaction, the deep beam is divided into several sub-elements, and individual degrees of freedom are assigned to bars, which allow them to act independently. Since SS-S model is highly sensitive to several factors, a numerical definition of RC deep beams' shear behaviour is presented after assessing the contribution of main effective parameters on RC element's shear behaviour. The mentioned model is a push curve which has three breaking points. Proposed SS-S model is composed of several mathematical equations which allows users to easily predict the shear behaviour of RC deep beams without dealing with complex and time-consuming calculations.

Keywords: nonlinear analysis; fibre model; shear stress-strain; SSR; bar-concrete interaction; shear deformation; deep beam; MCFT.

DOI: 10.1504/IJSTRUCTE.2020.108533

International Journal of Structural Engineering, 2020 Vol.10 No.3, pp.254 - 270

Received: 21 Nov 2018
Accepted: 16 Nov 2019
Published online: 16 Jul 2020 *

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