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Thanks for your reply!

Dear Dr. mckenna, I had sent you an E-mail to fmckenna @ berkeley.edu at may 10. Have you reveived yet? I am looking forward to hearing from you. Thank you!

Hi! fmk.
I have sent my scripts to fmckenna@berkeley.edu, have you received yet?

Here.
[url]http://opensees.berkeley.edu./community ... 492bac702e[/url]

Hi! I am modeling a viscous damper with truss element. I use the control scrips for convergence. However, the result seems to be wrong. Small displacement variation can cause big velocity variation, which produce the big damping force. Someone say it's the integral method cause the ploblem. Would yo...

The matlab scrips you mention can be use in RC section as well.
I find it is a useful tool to check the section.

Thanks!

That's a great help!
If I put viscous material in a truss element, dose L equal the truss length?
And what is L stand for if I use a zerolength element with viscous material?

Thanks for your help!

Sorry，what I want to say is we define section area depend on what, my english is poor. Thanks for your reply!

Thanks! As you say, we define truss directly with viscous material. but how to define the material area?

Hi!fmk. Do you means use 2 nodes for 2 zerolength element in pallarel?
I have a another question. I use viscous material in a Uniaxial Section with
a truss to simulate viscous brace, which get same result with that without brace. Can you tell how to model a viscous damper? Thanks!

try a smaller alpha

Hi! Thanks a lot.
what can we get by using plot_circle.m?

Hi! zhangchuanchao.I'm from china too. My QQ number is 59228664. I think we can talk about how to build SRC section in opensees.