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Hi, I did the example of the OpenSees-Homepage: >>Pushover Analysis of 2-Story Moment Frame<< (http://opensees.berkeley.edu/wiki/index ... ment_Frame) and it seems to work quite well. But now I inserted a node recorder to record the nodal reaction of the 3 nodes at the base (numbers 11, 21, 31) for ...

What I have forgotten: the redorder I added looks like this

set recorderCommandGravity "recorder Node -file Gravity.txt -time -node 11 21 31 -dof 2 reaction"
set rectagGravity [eval $recorderCommandGravity]

and after the analysis:
remove recorder $rectagGravity

thanks, Clemens

Hi, I did the example of your homepage: >>Pushover Analysis of 2-Story Moment Frame<< (http://opensees.berkeley.edu/wiki/index.php/Pushover_Analysis_of_2-Story_Moment_Frame) and it seems to work quite well. But now I inserted a node recorder to record the nodal reaction of the 3 nodes at the base (n...

Hi, I have a question, but I am not sure whether it makes sense or not: Is there a possibilty to make a fiber model of a column to have a certain value of bending stiffness but to make it axial rigid at the same time? I need it for comparison with a more easy model, where I took an inelastic concent...

Hi Vesna, the model isn't big at all. Just a 18-story-1-bay-frame with plastic hinges at the end of the beam/column elements. I checked whether I am creating lists which I don't clear after usage - there are no. When I look at my main memory when using NewtonLineSearch, than the demand increases con...

Hello everybody. I am having a question to the NewtonLineSearch algorithm. I am doing a transient analysis (IDA) with the NewtonLineSearch algorithm and the Newton algorithm, respectively. When I use the Newton algorithm, I have no problems with my memory, since the demand remains constant during an...

Hello everyone! I have problems with the calculation of the eigen periods of a simple structure. The structure is a single story single bay frame structure with lumped masses. For Comparison I did 2 different modelings of the frame structure: a) using elastic elements b) using rigid elements and ass...

Hello, I am doing a Pushover-Analysis of a simple frame model, which has a weak story regarding strength. in the 13th of 18 floors. If I don't consider P-Delta, then everything is fine and the model / analysis runs fine. But if I consider PDelta, I get some convergence problems, which results in a s...

Hi. I modeled a plane moment-resisting frame structure with concentrated plasticity at the girders and columns ends. Therefore I modeled two types: 1) Type A: the element is elastic (and stays elastic) and the inelastic properties are assigned to rotational springs at the beam/column ends (with modi...

Hello, Just a little question, since I am not sure about the results I fot I am having a node recorder, recordering the third degree of freedom of a plain model (=rotation): recorder Node -file Outfile.txt -node 1001 1002 1003 1004 1005 -dof 3 disp Corresponds the sign of the output of all nodes to ...

I tried all the solvers, but non worked.
What does this error message say?
Is it an ill conditioned problem or something else?

I am using the following analysis commands:

algorithm NewtonLineSearch
system BandGeneral
constraints Transformation
numberer RCM
test NormDispIncr [lindex $TestTolList 0] 50 0
integrator Newmark $gamma1 $beta
analysis Transient

Hello, I do an IDA-analysis. But with some records the analysis stops at a certain intensity - and I dont know why. The error message I get is the following: Vector::Vector(int) - out of memory creating vector of size 1460 What is the problem? What can it be and how can I solve it? Thanks, Clemens

Hello, thanks for the answer. That means, that I have to do a "recorder Node" for each of the two nodes, recordering the "displacement" in the third direction (=rotations). After finishing the OpenSees calculation I have to take the data, subtract one from the other (for each tim...

Hello. I am doing an analysis with a plane frame structure using the concentrated plasticity approach. Therefore I modeled the plastic hinges at the girders ends by zero-length rotational springs: rotSpring2D. To recorder the difference in the rotations at the left and right end of the spring, I use...