Tangent stiffness proportional damping
Moderators: silvia, selimgunay, Moderators
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Tangent stiffness proportional damping
Hi all,
I ve noticed in a couple of reference examples, there is the tendency to avoid using tangent stiffness proportional damping in zero length elements with non-linear hysteretic behavior, and apply the stiffness proportional at elastic members only.
Why is that the case?
I would say using the initial stiffness damping is un-conservative, cos the inertia forces arising in the non linear regime are too-high (cos based on the initial stiffness value) and hence for instance the peak displacement would be quite low.
I ve noticed in a couple of reference examples, there is the tendency to avoid using tangent stiffness proportional damping in zero length elements with non-linear hysteretic behavior, and apply the stiffness proportional at elastic members only.
Why is that the case?
I would say using the initial stiffness damping is un-conservative, cos the inertia forces arising in the non linear regime are too-high (cos based on the initial stiffness value) and hence for instance the peak displacement would be quite low.
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- Joined: Mon Sep 09, 2013 8:50 pm
- Location: University of California, Berkeley
Re: Tangent stiffness proportional damping
Please see the below paper:
Chopra, A. K., & McKenna, F. (2016). Modeling viscous damping in nonlinear response history analysis of buildings for earthquake excitation. Earthquake Engineering & Structural Dynamics, 45(2), 193-211
Chopra, A. K., & McKenna, F. (2016). Modeling viscous damping in nonlinear response history analysis of buildings for earthquake excitation. Earthquake Engineering & Structural Dynamics, 45(2), 193-211
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- Posts: 71
- Joined: Wed Apr 05, 2017 12:49 am
- Location: ARUP, amsterdam
Re: Tangent stiffness proportional damping
Thanks for the reply. I cant find a student free download. Is there someone who'd like to share it?
selimgunay wrote:
> Please see the below paper:
>
> Chopra, A. K., & McKenna, F. (2016). Modeling viscous damping in
> nonlinear response history analysis of buildings for earthquake excitation.
> Earthquake Engineering & Structural Dynamics, 45(2), 193-211
selimgunay wrote:
> Please see the below paper:
>
> Chopra, A. K., & McKenna, F. (2016). Modeling viscous damping in
> nonlinear response history analysis of buildings for earthquake excitation.
> Earthquake Engineering & Structural Dynamics, 45(2), 193-211
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- Posts: 913
- Joined: Mon Sep 09, 2013 8:50 pm
- Location: University of California, Berkeley
Re: Tangent stiffness proportional damping
I will email it to you
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- Posts: 71
- Joined: Wed Apr 05, 2017 12:49 am
- Location: ARUP, amsterdam
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- Posts: 71
- Joined: Wed Apr 05, 2017 12:49 am
- Location: ARUP, amsterdam
Re: Tangent stiffness proportional damping
selimgunay wrote:
> I will email it to you
Dear Selim,
could you please share the document?
Thank you in advance for your help.
Regards,
Giovanni
> I will email it to you
Dear Selim,
could you please share the document?
Thank you in advance for your help.
Regards,
Giovanni
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- Posts: 913
- Joined: Mon Sep 09, 2013 8:50 pm
- Location: University of California, Berkeley
Re: Tangent stiffness proportional damping
I have emailed it to you. Please let me know if you cannot access it for some reason.