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Thanks you!

Finally i understand

Thanks for your answer! I have a last question to be really sure. Lets say i have only a shell of dimensions [a x a = 1 x 1] cm and one of the gp's is in the bottom left corner. The origin of the local coordinate system is located at (X = 0.5 , Y = 0.5) cm in the global coordinate system (right?) Th...

Thanks for your answer but i still dont get it, sorry So: 1.- The "eta" and "neta" values equals to 1/sqrt(3) that you say right? <GaussPoint number="1" eta="-0.57735" neta="-0.57735"> And more important: 2.- How can i use that information obtained f...

Hi All, I need to know if i can get the locations of the gauss points (gp) of a 4 node shell element (ShellMITC4, ShellDKGQ, ShellNLDKGQ) in a relative or global coordinate system. For example, if i use the command -xml y get this info for a specific gp and fiber of a layered shell element: <?xml ve...

Yeah, i have the same problem like a year ago

This element or material CANT be used for purshover analisys but rarely for cyclic analisys you can get good results.

Dr McKenna: Have someone look at the error for the ShellMITC4 problem using layered shell element for pushover analysis? Have someone look at the stress-strain relationship for this case of analysis? I don't understand why the element works for cyclic analysis and for pushover gives results with no ...

Hi, i tried changing the constraint to "Penalty Method" constraints Penalty $alphaS $alphaM $alphaS penalty αS factor on single point constraints $alphaM penalty αM factor on multi-point constraints Now i dont get the error mencioned above, but why i cant use the transformation constraint?...

Hi, i want to model Shearwalls with the SFI MVLEM element. i downloaded the example Example 1. SFI_MVLEM.zip avaible on: http://opensees.berkeley.edu/wiki/index.php/SFI_MVLEM_-_Cyclic_Shear-Flexure_Interaction_Model_for_RC_Walls This example runs fine I'm testing the same wall (RW-A15-P10-S78 (Tran ...

This is the code for pushover analysis using ShellMITC4 or ShellNLDKGQ with layered shell section. Look at the stress-strain (plot third column = sigma11 ). Something is not working with the element or material (althrough that works fine for cyclic analysis). If you can help me i would be really gra...

Yes, they look ok for cyclic cases and not ok for pushover analysis. At the stress-strain relationships for the pushover analysis i obtain a higher strength for the concrete as the one that is defined using the PlaneStressUserMaterial specially for the ShellMITC4.

Hi again dear fmk. i'm having trouble running pushover analysis using ShellMITC4 or ShellNLDKGQ. I was working on comparing these elements with cyclic tests available in the data base "ACI445B Structural Wall DataBase" avaible on NEEShub and works really fine. But when i run pushover analy...

That works, thanks!. the problem is when i use the command that you said for the layered shell: "recorder Element -file stressH.txt -time -ele 1 material 1 fiber 1 stress" The xml file contain this: <?xml version="1.0" encoding="UTF-8"?> <OpenSees xmlns:xsi = "http...

Last question please: In the LayeredShell section i have 10 layers with different materials. If i want the stress-strain relationship of a material in a specific layer, ¿how it works the "material $matNum matArg1 matArg2.." in the NOTE of the ShellMITC4 element? Because when use the elemen...

Oh!, thanks you! it works =)
Now i can plot the stres-strain relationship, but i have to understand the column order first.

Thanks again fmk

i am using this nDmaterials:

PlaneStressUserMaterial
PlateFromPlaneStress
PlateRebar
LayeredShell

and the steel02 for the PlateRebar