[Type text] ZANCO Journal of Pure and Applied Sciences The official scientific journal of Salahaddin University-Erbil ZJPAS (2018), 30 (1); 73-84 http://dx.doi.org/10.21271/ZJPAS.30.1.8 Shear Strength Comparison of High Performance Reinforced Concrete Deep Beams without Stirrups Between ANSYS vs Experimental Work Omar Q. Aziz 1 , Mohammad A. Ihsan 2 , Sinan A. Yaseen 3 1,2,3-Civil Engineering Dept., University of Salahaddin, Erbil, Iraq 1. INTRODUCTION Reinforced concrete deep beams are used as load-distributing structural elements, such as transfer girders pile caps, foundation walls, and offshore structures. The shear strength evaluation of reinforced concrete beams has been the subject of several studies that aimed to determine the influences of major parameters. The combination of stresses (bending and shear) in the shear span results in inclined cracks, which transform the beam into a tied arch. In general, reinforced concrete deep beams should have adequate shear reinforcement to prevent sudden and brittle failure after the formation of diagonal cracks, as well as to keep crack width at an acceptable level. Shear force presents in beams at sections at which bending moment changes along the span; it is equal to the rate of change of the bending moment. Using of deep beam in construction sector has increased due to its improved properties compared to ordinary beams. Shear resistance is one of most intensive area of research in deep beams. To Estimate the shear resistance of beams, researchers and standard codes have specified different formula considering different parameters into consideration. Choosing an appropriate model for predicting shear resistance of reinforced concrete deep beams was difficult A R T I C L E I N F O A B S T R A C T Article History: Received: 27 / 08 /2017 Accepted: 17 / 01 /2018 Published: 18 / 04 /2018 This study presents a theoretical analysis of high performance reinforced concrete deep beams without stirrups based on three-dimensional finite element (FE) models to predict the shear stress, shear strain, load deflection, and crack propagation of 16specimens via ANSYS (v14).The variables considered in the experimental program were compressive strength (normal strength concrete, 40 MPa; high strength concrete, 60 MPa; and high performance concrete, more than 100MPa), shear span-to-depth ratio (1, 1.5, 2, 2.5, and 3), and the ratio of the amount of flexural steel bars (1.35%, 2.40%, 3.76%, and 6.108%). Results obtained with ANSYS were compared with the experimental results to verify the accuracy of the FE models. The general behaviors based on the linear and nonlinear ranges up to failure of the FE models show good agreement with the experimental data. The effect of each parameter was discussed and compared with those in experimental works. Keywords: ANSYS Deep beams Finite element Reinforced concrete Shear strength High performance concrete *Corresponding Author: Sinan A. Yaseen Sinan.yaseen@su.edu.krd