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Hi;

I'm modeling a bridge and I need to set the modal damping 2% por the first 2 modes and for the rest 5%. How can I do this for time history? Raileigh damping?

Thanks!

I made a time-history analysis and recordin forces and displacements to compre them with the element capacity. I also want to graph the points of the history against the Moment-Curvature, and see if those points are above or beneath that curve. This is the reason why I need this type of recorder. Th...

What of is my element is dispBeamColumn?

Looking the values I supose they are:

Axial deformation, Curvature X, Curvature Y, Curvature Z, Moment X, Moment Y, Moment Z and Axial Force.

Is this right?

Hi everyone;

In a 3D model, I'd like to know what are the 8 columns of the "recorder element .... forceAndDeformation". I know some of them are moments and other curvatures, but which one is what?

Thanks!

OMG! Thanks!!! Now with the recorder like this: recorder Element -file $recordsout/eleC3.out -time -ele 1301 section 1 forceAndDeformation; I have a 9 columns file. The 1st is time but the other 8 what are? I suppose that fist 4 are from the bottom of the element and the last 4 are from the top, but...

Hi; I'm trying to get the curvature of a fiber element previously defined in another file (pier_Sections.tcl), like this. # ---------------- Define the section ---------------; section Fiber $fiberTag { # Create the concrete fibers: patch rect $matTag $numSubdivY $numSubdivZ $yI $zI $yJ $zJ; # From ...

thanks!

Thanks!

It was very helpful!. So, for my 3D model it would be:

recorder Node -file DispNode1.out -time -node 1 -dof 4 5 6 disp ;
recorder Element -file globalForceElement1.out -time -ele 1 globalForce ;

Right?

Now, the displacement of the recorder it is in which units? rad or rad/mm?

and what about the displacements, the x, y and z are in [mm] for ex. but what about the rx, ry and rz? curvature?

You have a 2D model. you only have 3 dof wich will result in fx, fy and mz the first three columns are at the begining of the element and the last 3 are at the end. The forces are the same because I asume your element is elastic.

Greetings!

Hi everyone! I have a 3D model with "N, mm and sec" as fundamental units and It has the 6 dof. When I ask for the displacements I have an output file with 6 colums and I'm assuming that it gives the results in global coordinates, wich means: displ. in X [mm], displ. in Y [mm], displ. in Z ...

silvia wrote:
> curvature is the rotational dof of a section deformation

Silvia, could you give please an example of the recorder?

Thanks!

wuhaoshrek wrote: > ehsanala wrote: > > hi > > How to Draw curve moment-rotation?Which recorder? > > > > grateful > > use element recorder to get the end node moment and rotational deformation, assuming > you are using beam column element. wuhaoshrek, I'm looking for this for a while, could you give...