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fmk wrote: > the ndf of the loads must match those of the current model command .. they > do not look at the ndf at the existing node. Hi, Frank, can I bother you to see the codes below? When I run it, it showed"WARNING ZeroLength::setDomain(): nodes 5 and 1have differing dof at ends for ZeroLe...

fmk wrote:
> the ndf of the loads must match those of the current model command .. they
> do not look at the ndf at the existing node.

Ok, I see the difference now. Thank you so much, it is really helpful.

fmk wrote: > i am afraid you need to replicate the command in a tcl procedure. if the > region is rectangular if 2d, or brick shaped if 3d this is easy to do. Thanks, Frank I did try to use model BasicBuilder -ndm 2 -ndf 3 right after the block element again, but it warned that I should put 2 degree...

Is it true that when we use block element to generate the mesh, we can only have translation degrees of freedom for each node? Because when I create "model BasicBuilder -ndm 2 -ndf 3", it showed the error: WARNING -- model dimensions and/or nodal DOF not compatible with quad element. After...

Hi, all Anyone can help me? I included the zerolength element to model the wood shear wall in 3D. I have come up with the converge problem, at 10 secs (the total running time is 12 secs) under the earthquake excitation. But after a series of warning of failed to converge, then it tried "Trying ...

linguan118 wrote: > The problem seems to stem from your model. Check such as material > parameters. Compare the elastic region first. Thank you for your answer. Yes, the material I used is highly nonlinear, because I was modeling the wood shear wall, so I used the zerolength element to include the S...

I have figured this out, the pushover displacement is the same as the protocol displacement, but the weird thing is at the beginning of the pushover, the force is huge. does it means the model is unstable or what? Thank you for helping in advance. source Wall01and00_beamcolumn.tcl; test EnergyIncr 1...

Hi, there
can anyone help me with this question:

I have the displacement protocol from the experiment data,
how can I make the pushover follow the same random cyclic displacement track?

thank you so much!!!

vesna wrote: > Try this: > > for {set k 1} { $k<= 5 } { incr k} { > recorder Node -file [format "modes/mode%i.out" $k] -node 1000 > 2000 3000 4000 -dof 1 2 3 4 5 6 "eigen $k" > } > > If you use -nodeRange you need only 2 arguments $startNode & $endNode, > but here you have us...

vesna wrote: > Which nodal recorder do you have on node 3000? node 3000 is a master node in the third floor rigid diaphragm. I recorder it like below for the eigenvalue analysis: 1000 2000 and 4000 are the master nodes for 1st, 2nd and 4th floor diaphragm. for {set k 1} { $k<= 5 } { incr k} { record...

Can any one help me to understand what happened in my model? I have used master node 3000 to put concentric mass for the rigid Diaphragm When I run the eigenvalue analysis the message comes: SAWSMaterial unaxial material - Written by Paxti Uriz, Exponent 2009 NodeRecorder::NodeRecorder - dataToStore...

I tried to test the model, for a zerolength spring, it is not allow to have the same displacement between these two nodes, is it right? which means the zerolength element must resist force and deformation? other wise, there will be warning "strain too large"? can anyone think about it for ...

Hi, anyone can help me? I tried to add isolators under a structure in 3D. the structure itself is running well. after I put one isolator under the building, then it came up with strain too large, and converge problem. I model isolator using one zerolength element and zerolengthsection element. the z...

vesna wrote: > OpenSees is unitless. You as a user can choose any set of units for your > model, but make sure to be consistent. Hi, Vesna. I know OpenSees is unitless. But I have a question. I model a zerolength element using saws material, one version is using kN, mm, sec, another is using kips, i...

scottswensen wrote: > I have been modeling wood-framed shear walls in OpenSees using > elasticBeamColumn elements for the framing and quad elements for the > sheathing. So far, my models have been able to run with some success. I > am looking to changing these quad sheathing elements to ShellMITC4 e...