I am working with DIANA and I'm going to conduct the analyze under reversed loading by using Menegotto Pinto plasticity model for reinforcement bar.
In the absence of experimental data, how can I find the parameters that are included in Menegotto Pinto plasticity model such as: initial tangent slope ratio, initial curvature parameters and all constant parameters (a1, a2, a3,a4).
Is there any explanation about all these parameters or someone may provide some information about?
All data for reinforcing steel that I have is Poisson ratio=0.3, yield stress=472MPa, and modulus of elasticity=214000
Thanks in advance.
Prost Balenda Filippou et al. suggest R0=20, a1=18.5, a2=0.15, a3=0.01, a4=5 (Filippou, Popov, and Bertero 1983) as parameters of the Menegotto-Pinto model
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