Search found 17 matches

by arash1985us
Thu Apr 08, 2010 11:18 am
Forum: OpenSees.exe Users
Topic: SP Command problem
Replies: 7
Views: 2042

Dear fmk: Thank you so much for your detailed answer.I wanted a diplacement control pushover analysis,instead of a target displacement only at roof,I defined several target displacements at each story.in this case I use sp command to push the structure to the predefined target displacements. As you ...
by arash1985us
Wed Apr 07, 2010 10:48 pm
Forum: OpenSees.exe Users
Topic: SP Command problem
Replies: 7
Views: 2042

# Units: ton, m #5 story-3 bay building model BasicBuilder -ndm 2 -ndf 3 set b 18.0; #frame length set h 3; #Model height set m1 2.059633028; #((3.3+0.2*1.2)*18)/(9.81*4))+(Story Weight1,2/(9.81*4)) for each node #External (DL+LL) + Story Distributed Dead Load) set m2 1.978695209; #((3.3+0.2*1.2)*18...
by arash1985us
Wed Apr 07, 2010 1:21 pm
Forum: OpenSees.exe Users
Topic: SP Command problem
Replies: 7
Views: 2042

Dear fmk, I am proud that a knowledgeable doctor like you reply me soon. I tried smaller steps and also modifiedNewton test,but still the problem remains. These are warnings: Starting OpenSees.. WARNING: CTestNormDispIncr::test() - failed to converge after: 20 iterations ModifiedNewton::solveCurrent...
by arash1985us
Wed Apr 07, 2010 4:49 am
Forum: OpenSees.exe Users
Topic: SP Command problem
Replies: 7
Views: 2042

Should I use :constraints Penalty $alpha SP $alpha MP for applying gravity load?If so,What are the value of $alpha SP and $alpha MP?
by arash1985us
Wed Apr 07, 2010 12:04 am
Forum: OpenSees.exe Users
Topic: SP Command problem
Replies: 7
Views: 2042

SP Command problem

Hi Dear Silvia,
When I use sp command rather than loading in pushover analysis,after applying gravity load,I have convergence problems,but when I delete gravity load it become works.What should I do?Should I change any parameter in gravity load???Change any test???
by arash1985us
Sun Jan 10, 2010 12:54 am
Forum: OpenSees.exe Users
Topic: Plastic Rotation
Replies: 2
Views: 1014

Plastic Rotation

Dear Dr.Silvia:
How can I record the plastic rotation at the both ends of an element?
by arash1985us
Mon Jan 04, 2010 3:13 am
Forum: OpenSees.exe Users
Topic: Multiple target displacement
Replies: 2
Views: 841

Thanks dear Silvia
by arash1985us
Sun Jan 03, 2010 10:50 am
Forum: OpenSees.exe Users
Topic: Multiple target displacement
Replies: 2
Views: 841

Multiple target displacement

Hi Dear Dr.Silvia, I want to know how I can push a structure to multiple target displacements.For example,when I have a 5 story structure,I have 5 target displacement for each story.How should I limit each story to a specified target displacement in the case that with changing the direction of later...
by arash1985us
Sun Jan 03, 2010 12:21 am
Forum: OpenSees.exe Users
Topic: multiple target displacements
Replies: 1
Views: 644

multiple target displacements

Hi, I want to know how I can push a structure to multiple target displacements.For example,when I have a 5 story structure,I have 5 target displacement for each story.How should I limit each story to a specified target displacement in the case that with changing the direction of lateral load that no...
by arash1985us
Mon Oct 26, 2009 9:19 am
Forum: OpenSees.exe Users
Topic: Verifying the results
Replies: 1
Views: 676

Verifying the results

Dear Dr. Silvia:
I did pushover analysis with SAP and OPENSEES.Should my capacity curves(Base shear vs. Displacement) be the same in both procedures?and with the same results(for example the maximum base shear)
by arash1985us
Wed Oct 21, 2009 8:32 am
Forum: OpenSees.exe Users
Topic: Recorder problem
Replies: 4
Views: 1275

Thanks dear Silvia...
by arash1985us
Mon Oct 19, 2009 10:36 am
Forum: OpenSees.exe Users
Topic: Recorder problem
Replies: 4
Views: 1275

I am using nonlinear beam-column element with fiber section.Am I allowed to use this record?
by arash1985us
Mon Oct 19, 2009 10:00 am
Forum: OpenSees.exe Users
Topic: Recorder problem
Replies: 4
Views: 1275

Recorder problem

Dear Silvia:
When I use this record:
recorder Element -xml ele1local.xml -time -ele 1 plasticRotation
It won't be opened and when I open it with excel it is empty.What is my problem?Can I use *.xml for any record?My version is 2.0.0
Thx a lot
by arash1985us
Mon Oct 19, 2009 6:08 am
Forum: OpenSees.exe Users
Topic: Converge problem
Replies: 2
Views: 2571

It works now!

Dear Dr. Silvia:
I doubled the fiber numbers from 20 to 40 and also increased displacement increment.Now it works without any convergence problems.Thank you so much
by arash1985us
Mon Oct 19, 2009 2:19 am
Forum: OpenSees.exe Users
Topic: Converge problem
Replies: 2
Views: 2571

Converge problem

Dear Dr.Silvia: I did a pushover analysis on a 2D concrete frame.At the end of analysis the following warnings were emerged,but it is written that my analysis is done.What is my problem?What should I change?I used nonlinear beam-column with fiber section.Thanks dear Dr.Silvia. Regards Number of Stor...