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Thanks very much Nick for your clear explanation ! Very Helpful !

Thanks ! I was just wondering why they are assigning material to direct 6 as well? And I understand that these springs should work in series with column so should I use "uniaxialMaterial Series $matTag $tag1 $tag2 ... ? Or, use of section aggregator to take into account axial,shear , and flexural in...

Hi I'd like to add springs at column top to simulate shear and axial responses as well . Can I use only one zerolength element but with 2 different materials in the direction of shear and axial forces? Then I can record the responses separately for axial and shear ! Or should I assign two zerolength...

Hi In the example regarding site response analysis ''http://opensees.berkeley.edu/wiki/index.php/FreeFieldSingle.tcl'' the stress is recorded using a quadrilateral element at gussian stress points (I assume 4 points per element) Q#1 They define just one material with tag number 1, however they are r...

I'd like to perform a modal pushover analysis in the transverse direction of my 3D , 6 DOF bridge. To this end, I need to get several transverse mode shapes. Since I am assigning different masses to different DOFs at each node, using the below code gives me a vector of 126 (21*6) elements for the no...

I'd like to perform a modal pushover analysis in the transverse direction of my 3D , 6 DOF bridge. To this end, I need to get several transverse mode shapes. Since I am assigning different masses to different DOFs at each node, using the below code gives me a vector of 126 (21*6) elements for the no...

But I am getting results from the other recorders ! Here is the code, please take a look if you have time wipe #First of all, it is convenient to place all output data in a subdirectory: file mkdir data set FileName0 "data/" # creating Nodes and Elements foreach angle {0} { source parameter.tcl sour...

Hello, I'm trying to record the base shear using either recorder Element -file Data_$filename$angle/reaction_$filename$angle.out -ele 100 globalForce OR recorder Node -file Data_$filename$angle/Vbase$filename$angle.out -node 11 -dof 2 reaction However, I am just getting columns of zero. I have playe...

Hi, If I change the -dof to "-dof 1" in the below code for eigen-value analysis, could I say the values I get are eigen vectors in the direction 1? If not , how can I recognize, in the vector generated by the below command, which number is related to which direction? for { set k 1 } { $k <= $numMode...

Hi, If I change the -dof to "-dof 1" in the below code taken from your main code of eigen-value analysis, could I say the values I get are eigen vectors in the direction 1? If not , how can I recognize in the vector generated by the below command, which number is related to which direction? for { se...

Hi, When I am using the modal analysis in OpenSees for my bridge which is 3D in OpenSees, I am getting 6 periods and 6 eigenvectors as I asked the program to do so. How can I recognize which of them are for longitudinal and which for transverse direction? Regarding eigenvectores , they have like 126...

Hello ! My beam is not aligned with the global axis and I defined the appropriate geometric transformation. I would like to record the transverse displacement at the end node of the beam. When I am using the node recorder command and set dof 2, is that recoding the disp in the direction of beam wher...

but in the element recorder how can I record the responses of 3 different materials ?There is no option in the element recorder doing that for me?

For modeling Longitudinal, Vertical and Transverse springs in a node, can I define just one zerolength element and assign 3 different materials in 3 different directions. If so, then since I can be able to assign orientation in only one direction per each zerolength command ,but we need to have 3 di...

Thanks Vesna ! I have one more question as well. What way you suggest to define the orientation of a zerolength element. My abutment model has 3 types of springs (i.e Long, Vertical, and Transverse) the global coordinate is - |z | | ------------------x and y is perpendicular to the x-z plain my abut...