Viscous Material

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This command is used to construct a uniaxial viscous material object. stress =C(strain-rate)^alpha

uniaxialMaterial Viscous $matTag $C $alpha

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$matTag	integer tag identifying material
$C	damping coeficient
$alpha	power factor (=1 means linear damping)

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NOTES:

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.

REFERENCES:

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)

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Code Developed by: Mehrdad Sasani, NEU