Question about Modelling of ADAS damper

[zareian1]

Can OpenSees model ADAS (Added Damping and Stiffness) damper which is the subcategory of metallic yield dampers and if it can how?

[fmk]

yes .. look at this paper to see how .. it's just a zeroLength element with the correct material.

www.14wcee.org/Proceedings/files/S25-003.PDF

[susan]

Dear fmk,

The paper which you referred does not download. would you please write the title of paper and its authors?

[fmk]

Behavior and Performance of Structures Equipped With ADAS & TADAS Dampers (a Comparison with Conventional Structures)
Seyed Masoud Sajjadi Alehashem, Ali Keyhani and Hassan Pourmohammad

another link to it:
http://www.iitk.ac.in/nicee/wcee/article/14_S25-003.PDF

and here is another one in which they use OpenSees:
Evaluating response modifi cation factors of TADAS frames
Mussa Mahmoudi and Mohammad Ghasem Abdi

article 17 in
http://www.sciencedirect.com/science/jo ... 143974X/71

[teruna]

Dear fmk, any user

I am new beginner in opensees. I would like to simulate steel damper as zero length element with bilinear force-deformation relationship ( i.e. elastic stiffness, yield force or yield displacement, and post yield stiffness ratio). The input of loading is cyclic increasing displacement. My aim is to obtain hysteresis loop of the damper. I read from opensees getting started about integrator displacement control under cyclic load, and i am confused why we still need to define the load value? In fact, We can get the load or reaction for any given displacement. Would you to guide me to solve this problem?

Regards
Teruna

[auneng]

thanks alot, fmk
i really want to know about it