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by fakharifar.mostafa
11 Mar 2015, 19:49
Forum: 02-Getting started with the modelling
Topic: Incremental dynamic analysis vs pushover
Replies: 4
Views: 5962

Re: Incremental dynamic analysis vs pushover

<t>I am not sure if I totally understood your point, but discrepancies between pushover results and dynamic analyses has already been cited in the past. <br/> <br/> Static pushover analysis (SPA) lacks a rigorous theoretical foundation since the nonlinear response of a structure is assumed to be rel...
by fakharifar.mostafa
08 Mar 2015, 17:29
Forum: 03-Analytical/modelling capabilities
Topic: Modeling shear critical column hysteresis
Replies: 5
Views: 4027

Re: Modeling shear critical column hysteresis

<t>Dr. Pinho, thank you really so much for your input on this topic. I had forgotten such parameter. That helped. THANK YOU!<br/> <br/> Dear Rashid, many thanks for your contribution. Indeed I had the older version of IDARC Manual and had tried to tweak such behavior through multi_lin element. Thoug...
by fakharifar.mostafa
07 Mar 2015, 20:43
Forum: 03-Analytical/modelling capabilities
Topic: Modeling shear critical column hysteresis
Replies: 5
Views: 4027

Re: Modeling shear critical column hysteresis

<t>Thank you really so much Rui for your discussion on this topic. <br/> <br/> Does anybody have any recommendation/hint regarding the modeling strategy and link element type to be used to model shear-dominant columns? I have been able to reproduce the pinched response, but attainment of the signifi...
by fakharifar.mostafa
06 Mar 2015, 18:49
Forum: 03-Analytical/modelling capabilities
Topic: Modeling shear critical column hysteresis
Replies: 5
Views: 4027

Modeling shear critical column hysteresis

<r>Hello,<br/> <br/> While I have been successful simulating accurate hysteresis behavior of FLEXURAL dominant RC columns with pretty much any type of confining device (e.g. stirrups, steel jacket, FRP jacket, welded stirrups, FRP+steel jacket) in SStruct, I have difficulty capturing the pinched pos...
by fakharifar.mostafa
10 Jan 2015, 07:49
Forum: 03-Analytical/modelling capabilities
Topic: capacity spectrum
Replies: 1
Views: 2197

Re: capacity spectrum

<r>SStruct does not do such function.<br/> However, you can use other resources, such as:<br/> <br/> "SELENA - SEismic Loss EstimatioN using a logic tree Approach"<br/> <br/> Such package is a comprehensive series of Matlab files and provide all the required functions. Link to the website:<br/> <br/...
by fakharifar.mostafa
25 Dec 2014, 19:33
Forum: 02-Getting started with the modelling
Topic: Stiffness Degradation from Takeda Hysteresis Plot
Replies: 14
Views: 13267

Re: Stiffness Degradation from Takeda Hysteresis Plot

Best of luck to you adeelfaisal and Merry Christmas.
Don't forget to share your research results in the forum regarding the use of the great SeismoStruct package!
by fakharifar.mostafa
24 Dec 2014, 19:29
Forum: 02-Getting started with the modelling
Topic: Stiffness Degradation from Takeda Hysteresis Plot
Replies: 14
Views: 13267

Re: Stiffness Degradation from Takeda Hysteresis Plot

<r>1- I guess your stiffness should be:<br/> <br/> K= {(Fmax+ve)+(Fmax-ve)}/{(Dmax+ve)+(Dmax-ve)}<br/> <br/> 2- As long as stiffness degradation, Takeda should work just fine I guess. I recall I recommended using the Sivaselvan and Reinhorn work, as you could explicitly specify the extent of strengt...
by fakharifar.mostafa
21 Dec 2014, 20:59
Forum: 02-Getting started with the modelling
Topic: Stiffness Degradation from Takeda Hysteresis Plot
Replies: 14
Views: 13267

Re: Stiffness Degradation from Takeda Hysteresis Plot

<r>Dear adeelfaisal,<br/> <br/> Huffte's recommendation is perfect. I have an additional comment, stiffness degradation is often reported as an average value at constant drift limits, for static cyclic column, joint, member tests.<br/> <br/> For clarity of what I mean, look at Figs. 10 & 11 of t...
by fakharifar.mostafa
16 Dec 2014, 17:06
Forum: 02-Getting started with the modelling
Topic: Accelerogram on Scaled Down Structure
Replies: 2
Views: 2746

Re: Accelerogram on Scaled Down Structure

<r>In shake table tests in addition to the scale factor of the prototype structure, low cycle fatigue is considered as well (they try to avoid it at first runs!). Based on the what I know, answer to your question is YES,the time history is reduced for a prototype structure, but not 1/6 exactly (they...
by fakharifar.mostafa
22 Nov 2014, 04:53
Forum: 04-Unexpected behaviour/errors
Topic: Common range check errors
Replies: 12
Views: 8068

Re: Common range check errors

Maximum tolerance is the program default (i.e., 1e20)

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