I’d like to know if I can model the different environmental conditions like fire, freezing and thawing, effect of temperature and see its effect on the behaviour of concrete in Atena software.

Thanks in advance

]]>I am using ATENA 3D to do parametric study.

I have 60 reinforcement bars with a bond material. I want to replace the current bond material with another one.

Is there any way to change bond material for all reinforcement bars at once? instead of changing the properties to each bar individually or erasing the current bars and create new bars.

Thank you.

]]>Is there a way to manually select reinforcement bars using keyboard?

I tried holding "shift" key ⇧ and move with arrow keys but did not work.

Thank you.

]]>I'm still working about dynamic and static analysis for frames in reinforced concrete for my PhD, but i would like know if there methodologies specifics for do these analisis in atena.

Or if there are examples that can help me better.

Thanks you

]]>I am modeling a column and I applied 5 step axial load first and then 10 step for monotonic lateral displacement. Almost 15 step. I check the LD diagram with experimental and all matches but the problem is that according to experimental it should not fail sooner that step 15 but mine fail step 13 and get the error that "The execution is killed due to violation of stop iteration criteria” I check the 2.4.2 of Troubleshooting and I check conditional break but I did not understand what should I do with my numbers. And I think if it fixes, the answer will be get. ( WHAT CAN I DO SO IT WILL FAIL LATER?)

I try other things and check 2.1.19 Troubleshooting and use Stiffness type: Elastic predictor, Update stiffness/Assemble Stiffness: Each step and the thing that happen is that column will not fail and at the end I received and error criteria not satisfied and I add 3 more step but It did not fail again and as I said I expect from experimental that it fails step 15 or 16. I think if I add 2 other more step it will not fail again

As I said I don’t have any idea about what number should be for error tolerance.]]>

Since I am using material parameters based on my experimental investigation, I have question regarding value of plastic strain at compressive strength. According to the theory manual and explanation of the parameter in Atena Science GiD interface, it can be calculated based on following formula FC/E. However when I am checking the formula according to the default Concrete EC2 materials I am not getting the same value. Consequently I used default value for matching concrete class with my examined materials. But I have Young's modulus value in case of one material subsequently lower so I would like to check how the value can be calculated.

]]>I'm trying to model in Atena 2D a RC beam reinforced flexurally with FRP. I'm using an Sbeta constitutive for concrete.

I have noticed a better approximation with experimental data when I use Linear Softening Based on Local Strain for concrete in tension, however I'm not sure why would this be.

Also, I would like to be sure what "softening parameter 3" in Linear Softening Based on Local Strain stands for. Is it a strain c3 shown in Figure 2-7 in Atena theory?

Best regards,

José Luis

]]>Intended mode of failure is splitting with stresses well below yield strength. But I am getting yielding in bar and L-D curve becomes plateau at peak load. In reality load should drop immediately after reaching peak value.

I double checked material properties, what could be possible reason of such behavior. L-D attached below.

https://drive.google.com/open?id=1ErbeA … sw7m1ZHc95

Thanks

]]>I have two questions:

How can I choose "Semi" Updated Lagrangian Formulation in ATENA? (Table 1.6-1 - Theory Manual)

Does Total Lagrangian Formulation corresponds to Geometrically Linear analysis? (And updated Lagrangian formulation to geometrically nonlinear?)

Thank you,

Kamal

I have been examining 3D shell model for bridge deck. However I have problem with convergence and consequently with L-D diagram in a way that after the peak load is reached the convergence can not be reached and values in L-D diagram are faulty. I am using arc-length and I have increased the mesh units in thickness of the shell to 4. Since I am modelling just 1/4 of the bridge deck I have translation constraints for symmetry planes and translation constraint in z direction where the grider is supposed to be. I am also applying load on surface. I am following the load and displacement for the mid point of the slab.

]]>I have tried to modelling a compression contact between two columns with interface

i get serviral errors

that CC3DInterface" is not permited for Element Type: Line, Triangle, Quad, Tetrahedron, Poin

the process was:

1-Gemoetry -Creat-Contact-volum >>>>and i selceted all surfaces to be conected

2- assign a metrial for this surfaces with interface using CC3d since my modell is 3d Proplem

the contact area like below

https://drive.google.com/file/d/1I1fHWF … sp=sharing

thank you very much

]]>I would like to present a study of punching shear capacity of flat concrete slab-column connections.

How can generate discrete reinforecment to 3D nonlinear/linear elemnts with shear stiffness (ATENA_Theory 10.2.3 is not enough for me)?

Thanks in advance

]]>I am getting 0 values for bond stress and slip monitor in ATENA 2D. What could be the possible reason.

While i am getting values for all other monitors.

Thank you

]]>My name is Ingrid.

I'm doing one fram with two bays model with one cycle load (Bidimensional 2D). But i have few questions about it.

1) How can i defined the parameter tension stiffening (concrete), i read in any papers that the deffault (Model code) is 0,4. But, there are any equation for modified or how can i define this value?

2) How could define the value unloading factor (concrete)?. I didn't find many information for unsderstand this value...

3) My model have one cyclic load. So, i modelled the stirrups and longitudinal steel like CCCyclingReinforcement, but i woulk like know how can i determine the values R, c1 and c2 from Menengotto-Pinto...?

Thanks

Ingrid