Authors: Asghar Amani Dashlejeh; Abolfazl Arabzadeh
Addresses: Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran ' Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
Abstract: A new simple strut-and-tie model was presented in this paper to study the behaviour of reinforced concrete deep beams. This model was obtained based on bottle-shaped struts that can predict flexural, bearing and shear modes of the failure. Also, the effect of web reinforcements was considered. The proposed model was verified by laboratory test results that obtained from five deep beams with a shear span-to-depth ratio of two and some other experimental results existing in the literature. Comparison of the results of the proposed model with relations from ACI 318 and AASHTO-LRFD codes and some other relations showed that the proposed model is efficiently capable of accurately predicting the ultimate load of simply supported deep beams. Also, comparison of experimental results demonstrated that the flexural capacity of deep beams obtained from the strut-and-tie model is conservative.
Keywords: deep beam; strut-and-tie model; STM; reinforced concrete; shear load.
International Journal of Structural Engineering, 2019 Vol.10 No.1, pp.1 - 24
Received: 22 May 2018
Accepted: 13 Jan 2019
Published online: 31 Jul 2019 *