Project Overview
In this Abaqus project, the behavior of a Cobiax slab is simulated and investigated under axial loading.
The Cobiax slab has a length and width of 4 meters, and an axial force of 440 kN is applied to the slab. The main objective of the simulation is to investigate the structural response of the voided concrete slab and evaluate its deformation and damage behavior.
Cobiax slab model developed in Abaqus.
Cobiax Slab Configuration
In the model, the Cobiax elements are arranged next to one another at a specified distance. Two wire meshes are then positioned above and below the Cobiax elements, followed by the placement of concrete around them.
The Cobiax elements are modeled as spherical bodies with a diameter of 315 mm. Their presence creates hollow cavities inside the concrete slab, reducing the amount of concrete required and consequently reducing the weight of the slab.
Arrangement of the spherical Cobiax elements inside the concrete slab.
Arrangement of the spherical Cobiax elements inside the concrete slab.
Concrete Damaged Plasticity Model
The concrete material is defined using the Concrete Damaged Plasticity (CDP) model in Abaqus. This material model is used to investigate the nonlinear behavior and damage development of the concrete slab under loading.
Tensile Damage and Crack Propagation
The tensile damage and crack propagation in the concrete can be observed during the Abaqus analysis. The damaged regions are highlighted in red in the simulation results.
The DAMAGET variable is used to evaluate tensile damage in the concrete. As the applied force increases, the tensile damage develops further and larger regions of the concrete slab become damaged.
Tensile damage and crack propagation in the concrete slab.
Tensile damage and crack propagation in the concrete slab.
Force-Displacement Diagram
The force-displacement response of the concrete slab is obtained from the Abaqus results. This diagram can be used to evaluate the relationship between the applied force and the vertical displacement of the slab.
Force-displacement diagram obtained from the Abaqus analysis.
What You Will Learn
- How to model a Cobiax slab in Abaqus.
- How to arrange spherical Cobiax elements inside a concrete slab.
- How to model the concrete using the CDP model.
- How to investigate tensile damage in concrete.
- How to visualize crack propagation in the concrete slab.
- How to obtain vertical displacement results.
- How to extract a force-displacement diagram from Abaqus.
- How to process material and numerical results using Excel.
Deformation of the model.
Key Features
- 4 × 4 m Cobiax concrete slab.
- 440 kN axial loading.
- Spherical Cobiax elements.
- 315 mm Cobiax element diameter.
- Concrete Damaged Plasticity (CDP) model.
- Tensile damage evaluation using DAMAGET.
- Crack propagation visualization.
- Vertical displacement analysis.
- Force-displacement diagram.
- Abaqus CAE file.
- Abaqus INP file.
- Excel file containing concrete material data.
- Excel file containing force-displacement results.
- Step-by-step training video.
Project Information
Important information about this project
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