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Thanks for your reply, I have already solve my questiopns, this method can achieve γ and β

I want to simulate Steel01 material in Hysteresis behavior by the BoucWen model (No stiffness or strength degradation). The stiffness ratio is 0, and the initial stiffness and yield displacement are known. Juan David Morales once proposed the relationship between yield displacement Uy and γ and β, b...