This command is used to construct a uniaxial viscous material object. stress =C(strain-rate)^alpha
|uniaxialMaterial Viscous $matTag $C $alpha|
|$matTag||integer tag identifying material|
|$alpha||power factor (=1 means linear damping)|
1. This material can only be assigned to truss and zeroLength elements.
2. This material can not be combined in parallel/series with other materials. When defined in parallel with other materials it is ignored.
See Eqn 9 in G. Pekcan, J.B.Mander abd S.S. Chen, "Fundamental Considerations for the Design of Non-Linear Viscous Dampers", Earthqauke Engineering & Structural Dynamics 28,1405-1425 (1999)
Code Developed by: Mehrdad Sasani, NEU