I'm working on pounding problem. I'm looking to find what structural elements--springs--have people used to represent the point of impact in two buildings that pound together?
Are there contact elements or gap element in the OpenSees?
Thank you!
Pounding element
Moderators: silvia, selimgunay, Moderators
Re: Pounding element
one option is a gap material in a zeroLength element. the nodes do not have to be together, just ignore the warning message,
http://opensees.berkeley.edu/wiki/index ... p_Material
http://opensees.berkeley.edu/wiki/index ... p_Material
Re: Pounding element
Hi fmk,
Thank you for your reply. what is the difference between the gap material and the impactmaterial. Isn't the impactmaterial more accurate for pounding. Also, if I want to use the impactmaterial, can I use deltaM, penetration parameter, equal to 0. the pounded frames are special moment steel frames, so I assume no penetration is allowable between the frames.
Thank you in advance.
Thank you for your reply. what is the difference between the gap material and the impactmaterial. Isn't the impactmaterial more accurate for pounding. Also, if I want to use the impactmaterial, can I use deltaM, penetration parameter, equal to 0. the pounded frames are special moment steel frames, so I assume no penetration is allowable between the frames.
Thank you in advance.
Re: Pounding element
the impact material is more for bridges were you don't want to model what the bridge is pounding into and you want to loose some energy from the system via the damping. the gap is more for use when two buildings are banging into each other. i believe there is another material that can be used to offset the sudden jump in stiffnesses.
Re: Pounding element
Thank you for your replay. That is really helpful for me. I'll search for the material you mentioned to. Thanks a lot,
Re: Pounding element
fmk wrote:
> one option is a gap material in a zeroLength element. the nodes do not have
> to be together, just ignore the warning message,
>
>
> http://opensees.berkeley.edu/wiki/index ... p_Material
That helped me out with a very similar problem, thanks.
> one option is a gap material in a zeroLength element. the nodes do not have
> to be together, just ignore the warning message,
>
>
> http://opensees.berkeley.edu/wiki/index ... p_Material
That helped me out with a very similar problem, thanks.
Graduate from Soran University - First Class Degree in Computer Science.
Co-founder of Consumer Top – Responsible for computer and speaker testing.
Co-founder of Consumer Top – Responsible for computer and speaker testing.
Re: Pounding element
Hi bookerL,
May I know what values you used for $E and $Fy..
Thanks,
May I know what values you used for $E and $Fy..
Thanks,
-
mohdavoudi
- Posts: 1
- Joined: Tue Dec 13, 2016 4:19 am
- Location: iautc university
Re: Pounding element
fmk wrote:
> one option is a gap material in a zeroLength element. the nodes do not have
> to be together, just ignore the warning message,
>
>
> http://opensees.berkeley.edu/wiki/index ... p_Material
hi dear frank in this material damping between two contacted body It has not been considered .
please read this article . thanks dear frank
1- http://onlinelibrary.wiley.com/doi/10.1 ... 10402/full
2-http://www.sciencedirect.com/science/ar ... 9610000994
> one option is a gap material in a zeroLength element. the nodes do not have
> to be together, just ignore the warning message,
>
>
> http://opensees.berkeley.edu/wiki/index ... p_Material
hi dear frank in this material damping between two contacted body It has not been considered .
please read this article . thanks dear frank
1- http://onlinelibrary.wiley.com/doi/10.1 ... 10402/full
2-http://www.sciencedirect.com/science/ar ... 9610000994