there is no different in damped and undamped model

[sanami]

Please clear to me why my results for a RC structure were not different in damped and undamped state? I use ''none'' damping for one model, and, I use damping based stiffness for other model. These two models are same. I use damping in element class but there was no different. After that I use damping in the setting but the results was remained similar to undamped model. Could use help me for the reason?

[huffte]

What type of analysis did you run? Linear? Nonlinear? Static? Dynamic? Pushover?

[seismosoft]

The results are similar or the same? If they are similar, it means that damping has indeed an effect that is however limited. Maybe you have selected small values for the stiffness parameter? If instead the results are the same, apparently damping is not considered in your model.

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[sanami]

My element has a high height and its period based on eigen value analysis is 0.00844

[seismosoft]

Yes, but the results with and without damping are similar or exactly the same?

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[sanami]

They are same each. I thing that it was because of the low period T=0.006 sec. The span is 2 m and the section of the beam is 400x300 mm. It is under a vertical load at in the middle.

[seismosoft]

have you chosen the correct periods for the calculation of the mass and stiffness Rayleigh damping parameters?

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