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Hi Frank,

Thank you for your reply. After making the changes on ViscousMaterial.cpp, I just rebuilt the solution in Visual Studio. And in tcl file, I just call it as
"uniaxialMaterial Viscous $C $Alpha $minVel".

Hi, Can you please clarify if the "minVel" variable in the uniaxial Viscous material definition can be specified by the user? The source code shows that minVel is set to a default value of 1.0e-11. I tried to modify the source code (in ViscousMaterial.cpp aand ViscousMaterial.h codes,shown...

I am trying to understand how the Rayleigh damping forces are calculated in OpenSees for rotational degrees of freedom. To study the damping forces I am using the simple linear elastic cantilever structure that Vesna used previously (Chopra Ex. 5.1.). I specify only stiffness proportional damping (a...

I am performing nonlinear time history analysis on CBFs by applying bidirectional earthquake ground motions (horizontal and vertical). I have used the timeSeries command to define the two different GM records and applied them to the system by using the UniformExcitation pattern (with different direc...