Simulation of hollow core square reinforced concrete column wrapped with CFRP under compression in Abaqus

In this tutorial, the Simulation of hollow core square reinforced concrete columns wrapped with CFRP under compression in Abaqus has been studied. The concrete part is modeled as a three-dimensional solid part. The CFRP box in modeled as a three-dimensional shell part. The steel bars and strips are modeled as three-dimensional wire part and the rigid shell body is considered to apply the load. You can see figures of the assembled parts below

Wrapping FRP transversely with respect to column’s axial axis was mostly used. FRP wraps provide considerable confinement pressure to the concrete core under compressive loads delaying the crushing of concrete and buckling of longitudinal steel reinforcement, as a result, increasing the compressive strength and deformation capacity of the column.Hollow core columns having circular holes showed better performance as compared to columns having square holes. The Concrete Damaged Plasticity is used to model concrete behavior under compression load. The steel material with elastic-plastic behavior is used for the bars and strips. To model CFRP material, elastic data with lamina type and Hashin’s damage criterion is selected. In this tutorial both static and dynamic simulations are done. In the static simulation, general static step with some changes in the convergence model to avoid early not convergence is used. The bars and strips are embedded inside the concrete column host. The perfect contact is assumed between the outer concrete surfaces and CFRP box. The fixed boundary condition is assigned to the bottom sides of the column and displacement load to the rigid part. The mesh should be fine to obtain good results. In the static model the time of the simulation is too long because of the failure and damages which happened during the analysis and it can be replaced with a dynamic analysis. In the second model the dynamic explicit step with a mass scale is used. In the dynamic model, the failure can be obtained through the force-displacement diagram

After the simulations, all results such as stress, strain, damage, failure, force-displacement diagram, and … are available. You can see some figures for the results below

You can provide CAE ,INP,and English video files of this simulation here. The cost of these files is Twenty-Six Euros. you can click on the bellow bottom to beginning process

You can purchase the tutorial through a PayPal account, a Visa, or a Master card,  just before payment,send me an email to this address: karampourp@gmail.com