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Hi, Try the following recorder Element commands recorder Element -file ElementX.out - ele 1 -force recorder Element -file ElementX.out - ele 1 -deformation Check the following links http://opensees.berkeley.edu/wiki/index.php/ZeroLength_Element http://opensees.berkeley.edu/wiki/index.php/Element_Rec...

Hi, 'lappend' and 'eval' are tcl language commands .. For 'lappend', check http://wiki.tcl.tk/1479 .. The command actually add a new item to an already defined vector or matrix .. In your code nodeList is an empty vector/matrix. For each increment inside the for loop, lapped add a new row to the ini...

Hi, Can you share some more details about your model ? Is it a large model ? I have seen similar error messages when there is an error in the modeling part - like inadequate number of supports or nodes without being connected to any elements etc ... Did you do a simple modal analysis (eigen analysis...

Hi,

I still couldn't find a reason for this. I made sure I am putting all wipe commands in proper places and no variable is repeating.

Thanks,
Jeena

Hi,

@radmard - thanks for your suggestion. I cleared the analysis commands and model properties using 'wipe' and wipeAnalysis commands, but this didn't help to resolve the trouble.

@fmk, I have send the models to your email. Please have a look on those.

Hi all, I am running a model for dynamic analysis (incremental dynamic analysis ) using a set of ground motions. If I run the same model two different times under the same analysis conditions, I get slightly different responses ... I am not changing any model or analysis parameters and just running ...

Hi, There are a number of issues in your code. Modify the first part of the program as follows foreach {Name dt dtana PGA T} {chuetsuoki0909g 0.01 0.001 0.909 69.99} { for {set i 2} {$i<=30} {incr i 2} { set fileName [join {IDA/ ${Name} / [expr ${i}/20] pga} ""] file mkdir $fileName record...

Hi, I tried to change the last analysis part of your code as follows and it completed the analysis. I am not sure if the results are what you want, but the analysis was completed without errors. I changed the numberer command to 'Plain' instead of 'RCM' and system command to 'BandGeneral' ... remove...

Hi, Here is a 2 story shear wall model in 2D. Shear walls - modeled with zero length element at floor levels Truss elements connect between the floor levels along the height of the building Truss element connect the floors to the P-Delta column line Elastic beam column element for leaning column ele...

Hey, I eventually implemented the P-Delta effects by adding a P-Delta leaning column. The leaning column is modeled as a elastic beam column element with moment releases at top and bottom ... These leaning columns were added to the floor level of the shear wall by a truss element ... The results loo...

Any luck if you change the system command to FullGeneral or any other command ??

Hi, I might be wrong, but just couple of questions ... 1. Is the ground motion data stored in 'g' units ?? If it is in 'g' units, where u multiplying with 386.4 ?? 2. You are applying ground motion only in one direction of the structure (in direction 1, which is your global X axis). When recording t...

Hi, You can plot pushover plots in different ways. The most common form is to plot base shear against roof displacements or drifts. You can record the base shear as reaction at nodes at the base .. If you have a one bay, one story frame structure, then the base shear will be the total of the reactio...

Hi, How did you check the column moments ? I added element recorders and I tried to run your model. For each element, there is zero moment at the lower end (which are pinned) and some moment were present in the top end ... Try to record the reactions at the base nodes also. If the columns are pinned...

Hi, Did you mean after 3.23 seconds in a time history (for a transient analysis) ? If you meant 3.23 second in a time history, the following may (or may not) works for your case, Do the transient analysis in a for loop through the number of ground acceleration points, for {set i 0} {$i < $Nsteps} {i...