Numerical Investigation of Reinforced Concrete Beam Due to Shear Failure

Abstract

This paper investigates the possibility of using a multi-surface plasticity model to predict shear failure in reinforced concrete beams. The analysis is carried out using the in-house software called 3D-NLFEA. The constitutive model for the concrete material is based on the plasticity-fracture model, which had previously developed to simulate the behavior of concrete cover spalling in reinforced concrete columns.To obtain the asymmetric shear failure pattern, random material properties imperfection for each meshed element is used. Two beams available in the literature are investigated and compared with the analysis results using 3D-NLFEA. From the comparisons, excellent agreement between the analysis and the test result was obtained. 3D-NLFEA can predict the peak load accurately. The peak load prediction only varies 2.19% for beam OA1 and 3.28 % for beam OA2, and it was lower than the test results. The failure crack patterns also show a typical diagonal crack extension from the support to the loading steel plate.

Shear Behaviour Analysis of Reinforced Concrete Beam Using Non-Linear Finite Element Simulation

“…Based on research conducted by Vecchio and Shim, there are 12 beams each, of which 3 beams are without stirrups and 9 beams are with stirrups. The modelling of the beam without stirrups has been previously modelled by [27] so that in this paper the modelling will be focused on beams that use stirrups reinforcement.…”

“…On the other hand, the concrete material properties can vary significantly. Researcher [27] express the aggregate size and composition may affect the fracture energy, initial micro-cracks, and the strength of the concrete material.…”

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 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. To generate asymmetric failure shear mode, random material imperfection was used.…”