Topic: BFRP RC beam
I'm trying to model a BFRP RC beam with ATENA 2D. But I'm having problems to get good results in comparison to the experiments. Even if I separately type in every information I got about the test and not let ATENA calculate the parameters.
The set-up is a four-point bending test. The model is only one half of the beam with the symmetry axis being fixed to the y-axis.
The concrete is modeled with 3D Non Linear Cementitious 2 and a bond-slip law according to Model Code 1990 is applied to the reinforcement bars.
The solution method is the Newton-Raphson procedure with elastic stiffness type and updating of the stiffness after each step.
I already tried to vary the parameters of concrete and the bond-slip law and the solution method. But it doesn't give me good results.
Thank you for your time and I hope you have some ideas what I can try to solve this problem. The Troubleshooting PDF already helped a bit but didn't give me good answers to my questions.