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Hello. I have a problem when running static pushover analysis. When the deformation of the building become larger and some material and element goes into inelastic range, the program stops because the tolerance of test cannot be satisfied. I used different algorithms (Newton, NewtonLineSearch, intia...

Hello, I want to know if the modal shape can be appeared correctly in 3D (version 2.5.0, rev 6345). I checked the "DisplayPlane.tcl" and "DisplayModel3D.tcl" in http://opensees.berkeley.edu/wiki/index.php?title=OpenSees_Example_8._generic_3D_Frame,_NStory_NBayX_NBayZ,_Reinforced-...

Hello,

I am wondering if there is any way of recording (total) base reaction? If there are many nodes on the ground, it may be sometimes hard to correct reaction on each node and sum them up.

Thx.

Thanks for your comment, The script you wrote above maybe helpful, but I just want to know which part of my script is wrong (the script was written above - on Wed Jun 08, 2016 2:03 pm). I am not interested in if OpenSees' explicit methods in itself work fine or not. The input I used "TAKY.th&qu...

Thanks for your comments, I think your script gives me the same results of what I got from the script I wrote above (Mon May 21, 2012 5:16 am) - the nodal displacement goes blew up. :( The point is that when I replace the analysis commands of explicit scheme: constraints Transformation numberer RCM ...

Thanks for your reply, I just changed the analysis time step to 0.000001 but I still got very strange displacement response (extremely large)... :? As you see the above script, the frame is essentially single-degree-of-freedom system, and the first modal period is set 0.7 second... :roll: I think th...

Dear Frank and users, I want to use explicit integration method for the nonlinear response history analysis. For the first step of this, I made a simple 1-bay-1story elastic frame and tried to analyze by explicit scheme (Central Difference). However, the obtained results was very strange (contained ...

Hello, I'd like to know if "patch circ" command uses "degrees" not "radian". Is anyone familiar with this thing ? The detail of this command is written in OpenSees wiki page, but the above thing is not described :? http://opensees.berkeley.edu/wiki/index.php/Patch_Command

Dear Sir/Madam: I sometimes had a short error message which might be related to the method of modeling (connection of nodes by elements, material properties, and definition of geometric transformation, etc...). I am just wondering if you can briefly explain the error message below (as an example amo...

Dear Sir/Madam;

I just want to know if the Truss element works fine if this truss element has no length.

When we use truss element which connects two nodes with identical positions, the following warning message appears:

WARNING Truss::setDomain() - truss 1 has zero length

Does this matter ?

Sue.

Hello, I want to know if trigonometric function can be used to simulate sinusoidal displacement- and velocity- controlled analysis AFTER static loading (ex. dead load) is imposed. I want to impose sinusoidal motion in the same direction as static load is imposed. It seems trigonometric function gove...

Thanks for your reply, skamalzare!

So overall the above script of mine seems to work fine to get absolute acceleration!!

Yea, I will double check this by looking at the boundaries with my motion as you wrote

Hello, I am wondering if the script below to generate absolute acceleration under multiple-directional inputs (horizontal & vertical motions) is o.k. or not: (I want to get absolute acceleration at node 1 in the horizontal & vertical directions, in 2-Dimensional space) # - - - - - - - - - - ...

Dear Sir or Madam. I want to record absolute (total) velocity in time-history analysis of structures. I wrote the following sentences in .tcl file to get absolute (total) velocity. Is this correct? If not, can you correct the sentence? # Record Absolute (Total) Velocity timeSeries Path 1 -dt $dt -fi...

Oh, I got it, thanks!