Modelling damper at the pin joint

02-Getting started with the modelling
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bahawise
Posts: 9
Joined: 18 Dec 2017, 14:26

Modelling damper at the pin joint

Post by bahawise »

Hello dear Seismosoft team,

I'm currently modelling damper element at the pin joint which allows damper to rotate freely. regarding this, I have modeled the damper and set the locals coordinate for it. hence, the damper deforms according to the fix local coordinates that I set which opposed to the real deformation of damper regarding the pin joint.
how can i fix this problem?

Regards
Baha
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: Modelling damper at the pin joint

Post by seismosoft »

Hello bahawise,
Unfortunately, it is not clear what you are asking. If it is about the orientation of the link element, please refer to the manual or the help system of the program.
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bahawise
Posts: 9
Joined: 18 Dec 2017, 14:26

Re: Modelling damper at the pin joint

Post by bahawise »

dear Seismosoft team,

to be clear, consider a viscous damper installed to the pinned joints at both ends. therefore, the damper has only axial resistance but can have free rotation in other direction corresponding to the pinned joints. referring to the manual, i can set orientation which is unchanged during analysis. but i need the orientation to be changed during analysis. hope you get my point

Thanks,
Baha
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: Modelling damper at the pin joint

Post by seismosoft »

Now it is clear, but unfortunately, we do not have any idea on how to do this.
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bahawise
Posts: 9
Joined: 18 Dec 2017, 14:26

Re: Modelling damper at the pin joint

Post by bahawise »

hope you consider this for the next version of the software. looking forward to seeing updates.
In fact the model that i have mentioned above has been modeled by seismostruct and been verified by experimental data. the analysis model has a good response if the displacement of damper is small. but in a large displacement which is not reasonable has a totally different behavior and the damper model is not a real model anymore.

Thanks,
Baha
bahawise
Posts: 9
Joined: 18 Dec 2017, 14:26

Re: Modelling damper at the pin joint

Post by bahawise »

I have another question:
how can i get the amount of total input energy from seismostruct?

Thanks for your support,
Baha
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seismosoft
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Joined: 06 Jul 2007, 04:55

Re: Modelling damper at the pin joint

Post by seismosoft »

Indirectly, by calculating the area below the hysteretic curves of the structure or particular members of it.
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bahawise
Posts: 9
Joined: 18 Dec 2017, 14:26

Re: Modelling damper at the pin joint

Post by bahawise »

dear Seismosoft team,

Thanks for your support,
I mean the total energy input curve including kinetic, strain and damping energy during the time of earthquake.

Sincerely,
Baha
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: Modelling damper at the pin joint

Post by seismosoft »

Unfortunately, there is no such output in SeismoStruct.
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