Product Overview:
This tutorial examines the axial compression simulation of an Ultra High Performance Concrete (UHPC) column utilizing Abaqus. UHPC represents a significant advancement in concrete technology, offering remarkable properties such as exceptional compressive and tensile strength, ductility, and durability. In the model, the concrete column is represented as a three-dimensional solid part, while the embedded steel bars are modeled as three-dimensional wire components. Additionally, two rigid shell bodies are incorporated to serve as supports and a force application body.

For modeling the bars or beams, elastic-plastic material properties of steel are utilized. The simulation of UHPC material using commercial finite element software facilitates an in-depth analysis of UHPC structures. The Concrete Damaged Plasticity (CDP) model available in Abaqus provides a reliable prediction of concrete behavior under load, having been effectively employed in various studies involving conventional concrete. In this analysis, key concrete material parameters include the modulus of elasticity (E), Poisson’s ratio (v), and specific CDP parameters. For cracked concrete, a constant Poisson’s ratio is established. The primary parameters for the CDP model consist of the dilation angle (ϴ), shape factor (Kc), stress ratio (rb0/rc0), eccentricity, and viscosity parameter.

A general static step is employed, accompanied by modifications to the convergence model. The general contact algorithm and associated contact properties are implemented, with the beams embedded within the concrete column. Fixed boundary conditions are assigned to the base of the rigid support, while a displacement boundary condition is applied to the top rigid body to exert a compressive load on the UHPC column. A fine mesh is essential to achieve precise results.

Upon completion of the simulation, various results are available for analysis, including stress, strain, displacement, and the force-displacement diagram. This diagram assists in identifying the failure zone within the UHPC column.