Non-linear finite element analysis of reinforced concrete deep beam with web opening

Abstract

The use of Reinforced Concrete (RC) deep beams in the building may require web openings or holes for electrical and mechanical utility passage. This web opening will change the behavior of the RC deep beam and may result in early cracks even at service load. Hence, it is important to use a suitable tool to predict the full response of the RC deep beam with the opening. For that purpose, a nonlinear finite element method using 3D-NLFEA software package which utilizes a plasticityfracture model is used to predict the behavior of RC deep beam. One deep beam specimen available in the literature is investigated. To study the effect of using structured and unstructured mesh, as well as different element types on the loaddeflection curve, the hexahedral and tetrahedral solid element was used. From the comparisons, it was observed that the crack pattern between two different meshes was not similar. Structured mesh often has straighter crack propagation compared to the unstructured mesh. The load-deflection curve for both models is similar and both models were performed satisfactorily in predicting the peak load of the deep beam.

Numerical Investigation of Reinforced Concrete Beam Due to Shear Failure

“…The concrete constitutive model in 3D-NLFEA is similar to that of the plasticity-fracture model in the ATENA software package [5,15] . One can also find some examples of using the 3D-NLFEA finite element package in modeling RC structures in Christianto et al [16] , Prasetyo et al [17] , Alius et al [18] .…”

Numerical Modeling of Steel Fiber Reinforced Concrete Beam with Notched under Three-point Bending Test

“…For the case of tensile fracture of plain concrete, a tensile cut-off failure surface is used [16]. The performance of the used model in 3D-NLFEA can be seen to be satisfactory to capture flexural and shear cracks in RC beam [25] and RC column [26], [27], and in RC deep beam [28]. In [25] , the simply supported beam was loaded with displacement control in the middle span.…”

“…The location of the crushed and cracked concrete can be predicted using 3D-NLFEA. In [28], a simply supported RC deep beam was loaded with a four-point bending test and was shown to have flexure and shear cracks. Due to the nature of tetrahedral elements which can have unstructured mesh pattern, random material imperfection to generate asymmetric load pattern was not required.…”