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Hi
what is the difference between equalDOF and equalDOF_Mixed command?
When should we use which one?

I want to model a simple RC circular column. Do BeamFiberMaterial2dPS and PlasticDamageConcretePlaneStress work?!!

hello
how can i see Brick up Element - OpenSees?
do you have any code to display Brick up Element ?

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?

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؟

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...

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?

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...

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 ...

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...

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)?

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...

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...

I take pic please see it

http://8pic.ir/images/ovqk9hawb0w8cz3lc9hc.png

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...