Finite Element Modelling of Laboratory Tests on Reinforced Concrete Beams Containing Recycled Aggregate Concrete

Abstract

The predictive accuracy of the finite element (FE) based packages are broadly based on the compatibility of adopted non-linear numerical procedures and incorporated material models. However, the routine way to define concrete material is not applicable to the concretes containing substitute materials in place of conventional concrete ingredients. Therefore, in this work, appropriate definition of materials in terms of stress-strain relations have been utilized to simulate the experimental work of RC beams containing coarser fractions of recycled concrete aggregates (RCA). The entire work has been carried out into two phases; an experimental work and the simulation of experimental work using FEA package, ABAQUS. In the experimental part, three number of fullscaled beam specimens were tested to failure through four-point monotonous loading. The replacement level of natural coarse aggregates was taken as 0.0, 50 and 100% by direct substitution. In the simulation phase, in addition to laboratory evaluated properties like compressive stress, tensile stress and elastic modulus, the measured stress-strain relationship for reinforcing steel and constitutive relationship for recycled aggregate concrete (RAC) reported in the literature have been considered as an input. The stress-strain relationships of RAC selected from the literature has been treated as user defined model. Besides the strength, serviceability in terms of deflections, crack patterns and load deformation characteristics of simulated beams have been investigated and compared with those of laboratory tested beam specimens.

Machine Learning Models for Mechanical and Micro Structural Properties of Recycled Fine Aggregate Concrete Using Different Mixing Approaches

“…The obtained results were subsequently validated by simulating them in the ATENA-3D simulation software (25). These types of studies demonstrate the increasing potential of recycled aggregate concrete for its structural applications (23,25).…”

“…Recently, an assessment was conducted on the laboratory properties of recycled aggregate concrete. Moreover, constitutive relationships were established by simulating the experimental outcomes (23) and stressstrain characteristics (24) of developed beams, utilizing the ABAQUS software. To evaluate the torsional capacity of both natural aggregate concrete (NAC) and recycled aggregate concrete (RAC) beams under pure torsion, an experimental investigation was conducted.…”

Non-destructive Corrosion Monitoring of Reinforced Concrete Steel Rebars in Chloride Media by Smartphone Magnetic and Analog Hall-Effect Sensors

“…A plastic cast with a length of 22.7 cm, a width of 14.9 cm, and a height of 4.9 cm was used to make a reinforced concrete block (Figure 2) [19][20][21][22].…”

A Numerical Study to Investigate Shear Behavior of High-strength Concrete Beams Externally Retrofitted with Carbon Fiber Reinforced Polymer Sheets

“…The concrete beam and steel plates are discretized into C3D8R as homogenous solid elements. C3D8R is a 3-dimensional continuum element that has 8 nodes as a brick element where each node has 3 degrees of freedom in the three directions with reduced integration upon iteration process to calculate the stiffness matrix for each load increment [20,21].…”