I am modelling concrete beam strengthened with FRP fabric in pure flexure zone on ATENA 3D. How can I define a material property for my FRP fabric? I am modelling the fabric as a macro-element then assigning property to it. I am confused about which material model should be used. Model associated with reinforcement offers the input of user-defined stress-strain curve, but it can't use in macroelements. What should I do? Please advise.

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