Search found 93 matches

by esi_opensees
Fri Dec 16, 2011 9:15 am
Forum: OpenSees.exe Users
Topic: displacement based element
Replies: 3
Views: 415

Re: displacement based element

it's up to you and what you want from analysis.
by esi_opensees
Fri Dec 16, 2011 9:12 am
Forum: OpenSees.exe Users
Topic: Eigen Analysis
Replies: 2
Views: 729

Re: Eigen Analysis

most probably the mass source in two programs are different. please apply sigma (pAL/2) to your nodal mass in opensees.
by esi_opensees
Sat Dec 10, 2011 11:14 am
Forum: OpenSees.exe Users
Topic: best reference of C++
Replies: 0
Views: 318

best reference of C++

Hi

i want to learn C++ in order to change the source of some algorithms in opensees. there are many references related to C++. in your opinion, what is the best reference for a civil engineer?
by esi_opensees
Sat Dec 10, 2011 11:05 am
Forum: OpenSees.exe Users
Topic: recorder in push analysis
Replies: 13
Views: 3174

Re: recorder in push analysis

is your model a bridge?

Iman Mansouri
-----------------
Univ. of Kerman
Iran
by esi_opensees
Sat Dec 10, 2011 10:01 am
Forum: OpenSees.exe Users
Topic: recorder in push analysis
Replies: 13
Views: 3174

Re: recorder in push analysis

Hi Nahid

It may be that the nonlinear effects are not very strong for your model. I suggest that increase the magnitude of your target displacement and then compare the results.

Iman Mansouri
-----------------
Univ. of Kerman
Iran
by esi_opensees
Fri Dec 09, 2011 7:43 am
Forum: OpenSees.exe Users
Topic: plastic hinge in pushover analysis
Replies: 5
Views: 6455

Re: plastic hinge in pushover analysis

I think you need to do a post-process step. You can use stressStrain as a argument of “recorder element”, draw the stress-strain curve, and see that material nonlinearity has been reached or not.
Any opinion?
by esi_opensees
Fri Dec 09, 2011 7:22 am
Forum: OpenSees.exe Users
Topic: Rayleigh Damping Implementation
Replies: 5
Views: 3475

Re: Rayleigh Damping Implementation

If Kinit then it is clear that the stiffness will not be updated If Ktangent then the stiffness will be updated (there is a choice which stiffness to use).
by esi_opensees
Fri Dec 09, 2011 7:18 am
Forum: OpenSees.exe Users
Topic: several BasicBuilder
Replies: 1
Views: 320

several BasicBuilder

Hi all

Can we use “model BasicBuilder” command several times in a script? We have a truss which its supports are beam-column elements.
by esi_opensees
Fri Dec 09, 2011 6:03 am
Forum: OpenSees.exe Users
Topic: recorder in push analysis
Replies: 13
Views: 3174

Re: recorder in push analysis

Nahid
You are using DisplacementControl integrator which means the control of displacement is set up by user and the output denotes force.
Your loading probably has a problem. Please send your script.
by esi_opensees
Wed Dec 07, 2011 5:26 am
Forum: OpenSees.exe Users
Topic: Time history analysis
Replies: 12
Views: 4514

Re: Time history analysis

Dear vesna

You modeled example 5.4 from Prof. Chopra's book. When I run your script, opensees doesn’t give any error message. But output files are empty. I use opensees 2.2.2. would you please tell me what the problem is?

Thank you.
by esi_opensees
Wed Mar 23, 2011 7:03 am
Forum: OpenSees.exe Users
Topic: getting source
Replies: 2
Views: 338

Re: getting source

Dear Dr. McKenna,

would you please guide me?
:(
by esi_opensees
Tue Mar 22, 2011 8:22 am
Forum: OpenSees.exe Users
Topic: getting source
Replies: 2
Views: 338

getting source

Hi, I want to change the opensees source. For example, in http://opensees.berkeley.edu/WebSVN/listing.php?repname=OpenSees&path=%2Ftrunk%2FSRC there are many files. which of them should be gotten? If all files are required, how can we download them together (is there zip format)? It is very time-con...
by esi_opensees
Tue Feb 15, 2011 8:51 am
Forum: OpenSees.exe Users
Topic: Prof. McKenna's dissertation
Replies: 1
Views: 734

Prof. McKenna's dissertation

Dear Prof. McKenna,

You put your dissertation in one of previous topics: http://opensees.berkeley.edu/community/ ... php?t=6683
Unfortunately, it is not possible to download it. :(
Would you plz put it again?

Thank you.
by esi_opensees
Thu Jan 27, 2011 10:02 pm
Forum: OpenSees.exe Users
Topic: progressive collapse
Replies: 0
Views: 442

progressive collapse

Hi,

Is there an element or command which can do progressive collapse in opensees?

tnx.
by esi_opensees
Thu Jan 07, 2010 9:50 pm
Forum: Useful Scripts.
Topic: We are collecting OPENSEES User-Requirements Data
Replies: 23
Views: 20361

Hi,
Thank you for your attention.
As a user I need some example for modeling of bridge.