Non-Metallic reinforcement in Sofistik

Hello, I’m currently doing my Master Thesis in Bridge Designing by using non-metallic (carbon) reinforcement on Sofistik.
As I have checked there is no option available in sofistik for it, general steel properties have to be altered in order to make this, but what value should I opt to get a feasible results. I am so confused.

Also does sofistik takes characteristic tensile value for analysis or design tensile vlaue?