Search found 24 matches

by omidgahremani
Wed Aug 12, 2015 5:17 am
Forum: OpenSees.exe Users
Topic: Question about modeling SDOF structures having its T,Sa &...
Replies: 7
Views: 2028

Re: Question about modeling SDOF structures having its T,Sa

yuanzhenwei wrote: > Have you solve your problem?I am a beginner in opensees,I met the same > problem with you. I need to model a single degree of freedom structure for > doing IDA analysis,but now I haven't solve the problem , Whether can you > give me the code ? We can communicate with each other ...
by omidgahremani
Wed Aug 12, 2015 5:11 am
Forum: OpenSees.exe Users
Topic: Question about Hysteretic material parameters
Replies: 2
Views: 518

Question about Hysteretic material parameters

Dear all, how can we know exactly what is the usage of this parameters in hyseretic material command : $pinchx pinching factor for strain (or deformation) during reloading $pinchy pinching factor for stress (or force) during reloading $damage1 damage due to ductility: D1(mu-1) $damage2 damage due to...
by omidgahremani
Wed Aug 12, 2015 4:40 am
Forum: OpenSees.exe Users
Topic: How to create Nonlinear SDOF Model (Single Dgree Of Freedom)
Replies: 2
Views: 518

Re: How to create Nonlinear SDOF Model (Single Dgree Of Free

Dear fmk,
Thank you for your help
best regards,
gahremani
by omidgahremani
Sun Aug 09, 2015 1:47 am
Forum: OpenSees.exe Users
Topic: How to create Nonlinear SDOF Model (Single Dgree Of Freedom)
Replies: 2
Views: 518

How to create Nonlinear SDOF Model (Single Dgree Of Freedom)

Dear all How can I create a nonlinear SDOF model for using in nonlinear response history analysis? and which parameters should I have to create this model? I'll be very grateful for any instruction or script that could help. P.S : my model has viscous damping and it need to be applied in modeling to...
by omidgahremani
Sat Aug 08, 2015 11:25 am
Forum: OpenSees.exe Users
Topic: how to model a specific plastic hing
Replies: 5
Views: 985

Re: how to model a specific plastic hing

you can use it for both option's.
by omidgahremani
Wed Jul 15, 2015 2:31 pm
Forum: OpenSees.exe Users
Topic: How to solve Convergence error of nonlinear static analysis
Replies: 5
Views: 2322

Re: How to solve Convergence error of nonlinear static analy

Dear fmk I don't know how to thank you for your help. that worked . what was that extra 1 at the end of test command for? I used your command like this and it worked. however it took more time than further analysis: #-----------------------------------------------------------------------------------...
by omidgahremani
Sat Jul 11, 2015 7:31 am
Forum: OpenSees.exe Users
Topic: How to solve Convergence error of nonlinear static analysis
Replies: 5
Views: 2322

Re: How to solve Convergence error of nonlinear static analy

Dear fmk I've tried your method but I could not see any differences between old and new model's response , Here is the scripts I used before and the scripts that I used according your instruction , please contact me If you find anything that can help me with this: ____________________________ Old sc...
by omidgahremani
Wed Jul 08, 2015 1:35 pm
Forum: OpenSees.exe Users
Topic: How to solve Convergence error of nonlinear static analysis
Replies: 5
Views: 2322

How to solve Convergence error of nonlinear static analysis

Dear all I am performing nonlinear static analysis on three steel structure with 3 ,6 and 12 stories that their plastic behavior modeled with concentrated plastic hinges just as done in the example represented for a 2 story steel frame in wiki opensees site. for each structure at specified displacem...
by omidgahremani
Tue Jun 23, 2015 1:39 am
Forum: OpenSees.exe Users
Topic: Error in PushOver analysis of concentrated plasticity model
Replies: 4
Views: 1204

Error in PushOver analysis of concentrated plasticity model

my model is constructed of elastic elements with localized plastisity at both end using zerolength elements." I am running opensses on my steel structure to perform a pushover analysis but the analysis fails and none of my recorders works correctly and I have no output after running the model. when ...
by omidgahremani
Tue Apr 21, 2015 8:42 am
Forum: OpenSees.exe Users
Topic: problem using Bilin material
Replies: 4
Views: 1184

Re: problem using Bilin material

I appreciate your help.
could you give me the name of referred paper "Lignos and Krawinkler (2011)" ?
by omidgahremani
Tue Apr 21, 2015 8:23 am
Forum: OpenSees.exe Users
Topic: problem using Bilin material
Replies: 4
Views: 1184

Re: problem using Bilin material

thanks a lot.
by omidgahremani
Thu Apr 16, 2015 1:50 am
Forum: OpenSees.exe Users
Topic: problem using Bilin material
Replies: 4
Views: 1184

problem using Bilin material

In defining bilin material there are four parameters known as cyclic deterioration parameters (Lamda_S,Lamda_C,Lamda_A,Lamda_K) that I don't know the correct values that must be assigned to them. I studied the corresponding references , but there is only one Lamda parameter that is around 1 accordin...
by omidgahremani
Thu Apr 16, 2015 12:57 am
Forum: OpenSees.exe Users
Topic: how to access latest commands and revisions of opensees
Replies: 2
Views: 434

Re: how to access latest commands and revisions of opensees

thank you.
so we cannot download it anymore?
by omidgahremani
Sat Apr 11, 2015 11:09 am
Forum: OpenSees.exe Users
Topic: question about defining multilinear material
Replies: 1
Views: 342

question about defining multilinear material

in this command is the number of points arbitary or we need to define a specific number of points to form the envelop? and if we need to define the negative part of the envelop we must enter that points ditinctly or defining the positive part of the envelop is enough ? I am very grateful for your at...