Currently, I Use Explicit Module for dynamic analysis in ABAQUS , If (for examaple ) i suppose (5%) =>" ζ = Damping ratio = c / (2 m ωn )" damping ratio for concrete or (another material) and My model was SSI (Soil-Structure Interaction).So
Is it true to define Damping ratio as Structural damping ?
structural damping=0.05?
Thanks