The OpenSees Community

hello silvia My structure is one story two bay I do not know whethethe its damping is same to the cantilever column Can I use it the following? please tell me ， thank you！ set xDamp 0.02; # 2% damping ratio set lambda [eigen 1]; # eigenvalue mode 1 set omega [expr pow($lambda,0.5)]; set alphaM 0.; #...

hello,silvia
sorry ,I can not understand you idea---try putting 2. instead of 2
where?and how to change ---the eigensolver is having a hard time, meaning your model is not fully constrained.
and I still can not find the error
can you point out to me in detail?
thank you!

hello everyone, I am analysising a 2-run single-layer structure, however the error is always exist . I can not find out , please help me find it Thank you! As follows wipe; # clear memory of all past model definitions model BasicBuilder -ndm 2 -ndf 3; # Define the model builder, ndm=#dimension, ndf=...

Thank you for your answer
But I would like to know what is mean of the shear-critical wall ?
The wall was destroyed with Shear failure ?

there is one element in opensees, look under nonlinear-beam-column elements————you mean the quad element ?

Hello everyone I am a novice is learning opensees modeling
I would like to ask how to build wall
Because I do not know how to do ,plea everyone's help
An example of a shear wall is also helpful I would like to thank

Hi All
When use the nonlinear beam column element ,I want to known about how the element consider Geometric Nonlinear ? and what theory support it ? I am in urgent need of this information ,could you give me some suggestions ? Thank you very much

Thank you ,but only a Website , the Website is difficult to get in ,please give me some other way to get the information . It is important for me
Please help me ,Thank you very much !

where can I get it ? In the opensees command language manual ?

Hi all How the number of integration points affect the opensees .In the examples the number of integration points are 5 .Could you give me some detailed introduction about how to set a better ? Because I am facing a problem that the P-Delta curve changed greatly when I change the number of integrati...

I want to model a column which are fixed at both ends , and a lateral load at the middle of the column ,then I use the Displacement control where the lateral load at . I have to do a displace-controlled cyclic analysis.
Thank you very much .

Thank you very much ,please tell me that whether opensees could define the two element into two columns ? the two elements should be two parts of one column ,do you think so?

I want to use the displacement control ,where the lateral load at the middle of the column ,that no node at the middle of the column. how can I due with it ?

I could not clear about that command
Thanks
pattern Plain 200 Linear {; # define load pattern -- generalized
eleLoad -ele 1 -type -beamPoint $Hload [expr $LCol/2]
}

But I can not find out the mistake,could you help me?/Thank you very much

Hi all
If I want to let the lateral load at the middle of the column ,how can I deal with ?
Whether could I do like this : define the column with three node ,the node 2 in the middle of the column ,define the column into two elements element 1 2 and element 2 3 Is this OK?
Thank you very much

I am sorry,I can not understand .The direction is set DoF 1 of Nod 2 . This is my procedure, Thank you for help me # units: mm, n, sec wipe; # clear memory of all past model definitions file mkdir Data; # create data directory model BasicBuilder -ndm 2 -ndf 3; # Define the model builder, ndm=#dimens...