Search found 16 matches

by alimohammadian
Tue Mar 23, 2021 10:30 pm
Forum: OpenSeesPy
Topic: equalDOF and equalDOF_Mixed command
Replies: 0
Views: 382

equalDOF and equalDOF_Mixed command

Hi
what is the difference between equalDOF and equalDOF_Mixed command?
When should we use which one?
by alimohammadian
Mon Oct 12, 2020 8:32 am
Forum: OpenSees.exe Users
Topic: BeamFiberMaterial2dPS
Replies: 1
Views: 505

BeamFiberMaterial2dPS

I want to model a simple RC circular column. Do BeamFiberMaterial2dPS and PlasticDamageConcretePlaneStress work?!!
by alimohammadian
Wed Apr 20, 2016 9:11 pm
Forum: OpenSees.exe Users
Topic: Brick up Element - dispaly
Replies: 1
Views: 532

Brick up Element - dispaly

hello
how can i see Brick up Element - OpenSees?
do you have any code to display Brick up Element ?
by alimohammadian
Sun Feb 14, 2016 6:37 am
Forum: OpenSees.exe Users
Topic: Error trying to retrieve disk usage
Replies: 1
Views: 555

Error trying to retrieve disk usage

hello
I use NEEShub for run my opensees code.
now I can not use OpenSees Laboratory when I click on launch Tool
I see the following :
trying to retrieve disk usage

can you help me?
by alimohammadian
Sat Feb 13, 2016 1:56 am
Forum: OpenSees.exe Users
Topic: failed to converge after 1500 iteration
Replies: 2
Views: 820

Re: failed to converge after 1500 iteration

dear fmk my Analysis codes are: numberer Plain system BandGeneral test NormDispIncr 1.0e-5 1500 2; algorithm KrylovNewton integrator Newmark 0.5 0.25 analysis Transient analyze [expr int(62.82/$dt)] $dt Is it better to use EnergyIncr insted of NormDispIncr ? if yes How to put its parameters؟
by alimohammadian
Thu Feb 11, 2016 10:41 pm
Forum: OpenSees.exe Users
Topic: failed to converge after 1500 iteration
Replies: 2
Views: 820

failed to converge after 1500 iteration

Hello I model 12 story frame. I try Time history analysis but after 17 sec (failed to converge after 1500 iteration current norm). Several times I check my code but I could not find the problem. Please guide me. The following code has been placed download link: http://www.uploadmb.com/dw.php?id=1455...
by alimohammadian
Sun Feb 07, 2016 10:40 am
Forum: OpenSees.exe Users
Topic: tie Structural node to soil node
Replies: 4
Views: 1146

Re: tie Structural node to soil node

Dear fmk

structural nodes have three degrees of freedom but soil nodes have two degrees of freedom.
What should be done with the third degree of freedom nodes?
by alimohammadian
Sat Feb 06, 2016 11:17 am
Forum: OpenSees.exe Users
Topic: solve (void) error 1 returned in factorization
Replies: 0
Views: 569

solve (void) error 1 returned in factorization

Hello I model soil with structure in 2d domain. When I analyze model under earthquake after 8 sec (step 1600) opensees show the following sentences solve (void) error 1 returned in factorization dgstrf solvecurrentstup the linearsysofeqn failed in solve analyza failed returned -3 error flag I upload...
by alimohammadian
Sun Jan 24, 2016 11:50 pm
Forum: OpenSees.exe Users
Topic: tie Structural node to soil node
Replies: 4
Views: 1146

tie Structural node to soil node

I want to tie Structural node to soil node. when I use equalDOF analysis fails. please see the following link http://www.axgig.com/images/79964375035339256768.png or http://8pic.ir/images/wqzxlqlzj8bvho0wg8ce.png How do I conncect structural node (three degrees of freedom) to soil node (two degrees ...
by alimohammadian
Sun Jan 24, 2016 1:29 am
Forum: OpenSees.exe Users
Topic: out normal vector of the master plane
Replies: 1
Views: 694

out normal vector of the master plane

I want to use Node-to-node frictional contact element. the following link: http://opensees.berkeley.edu/wiki/index.php/ZeroLengthContact_Element element zeroLengthContact2D $eleTag $sNode $mNode $Kn $Kt $mu -normal $Nx $Ny but I donnot know how define the following parameter: $Nx, $Ny The out normal...
by alimohammadian
Fri Jan 22, 2016 11:12 pm
Forum: OpenSees.exe Users
Topic: simulate foundation in 2d domain
Replies: 1
Views: 650

simulate foundation in 2d domain

I try model foundation of tall building in 2d domain. Depth of foundation is 4.5 m.(The foundation is a square with sides 18 meters and depth of foundation is 4.5 m)

Can you help me (how I can model foundation in 2d domain)?
by alimohammadian
Wed Jan 20, 2016 8:15 pm
Forum: OpenSees.exe Users
Topic: WARNING GroundMotion
Replies: 8
Views: 2153

Re: WARNING GroundMotion

Dear Kamalzare I want to model soil with structure (in 2d) then I want to peruse displacement of soil and displacement of structure in same level ( Level of underground floors). I already studied example mentioned (Site Response Analysis ). If we Releas the degrees of freedom of base, We faced the w...
by alimohammadian
Wed Jan 20, 2016 8:56 am
Forum: OpenSees.exe Users
Topic: WARNING GroundMotion
Replies: 8
Views: 2153

Re: WARNING GroundMotion

Dear Kamalzare Your letter was correct. I picked up the dampers on both sides of soil and analysis was done properly. I record the movement of a point on the Earth's surface and the highest value of movement was 0.5 meter . but can you help me how I model dampers? please see the following pic : http...
by alimohammadian
Wed Jan 20, 2016 3:17 am
Forum: OpenSees.exe Users
Topic: WARNING GroundMotion
Replies: 8
Views: 2153

Re: WARNING GroundMotion

by alimohammadian
Wed Jan 20, 2016 3:13 am
Forum: OpenSees.exe Users
Topic: WARNING GroundMotion
Replies: 8
Views: 2153

Re: WARNING GroundMotion

Dear Kamalzare I use UniformExcitation command but opensees cannot solve problem.)Error that is not convergent( I put code in the following. -------------------------------------------------------------------------------------------- wipe #---GROUND MOTION PARAMETERS # time step in ground motion rec...