Where can I find "Number of bars" so I can change it?

]]>actually i model a uniaxial tensile test and i use the material model CC3DNonLinCementitious2User , but i have a problem that i always get a crack formation with the first time step without reaching the tensile strength.

so please which material parameter that i can adjust to make the first crack form when the material reach the tensile strength

many thanks for your reply in advance

]]>I have a question about the meshing in ATENA 3D. I have two macroelements and I want to make the size of the mesh for the first element different than the second macroelement. Because when I click Generate mesh the software directly make mesh for all the macroelements without asking me to select what macroelement I want to generate the mesh for it.

Thank you.

I use ATENA 3D to model pull-out test. Actually, I read ATENA Troubleshooting, 2.2.12 about pull-out test and everything ok. That I finished the model and after making running and finishing modelling I saw the cracks and the stresses and everything.

My question about the monitor point. Where I have to define the monitor points and what kind of the monitor points should I use? Because I am looking for the Bond stress - slip curve.

Please let me know about it.

Thank you.

Is there any specific thumb rule on assigning the values of cohesion,tensile strength and friction depending on the roughness of the interface in consideration?

I understand the relation between these parameters as per the ATENA user manual and troubleshooting guidelines. I want to know, for example, for a surface roughness of 3 mm, what should be the values of the above mentioned parameters? (f_t, c, mu)

]]>In modelling a beam in 2D, I want to alter the type of element used in FE mesh. I want to try 6-noded isoparametric triangular and 8 or 9 noded isoparametric quadrilateral elements.

In the definition of macro elements I chose mesh type as "quadrilateral". Now the further options available for quadrilateral elements are 'CCIsoQuad', 'CCQ10' and 'CCQ10SBeta'. I have gone through the explanations in ATENA Theory manual and ATENA Input file document. Based on what is given, isoparametric elements are given as CCIsoQuad<xxxx> and the quantity in <> specifies no. of no. of Gauss integration points in the element.

I guess, I should be choosing the option 'CCIsoQuad'. But the options appearing in the window of macro elements doesnt give an option to choose no. of integration points in the element ( <xxxx> ). How do I do that?? By default is it linear or quadratic ??

Regards,

Radhika

I want to model a reinforced concrete column with an increasing axial force until a specified load. I modeled the column with smeared reinforcement and add two steel plates to the ends, one for applying the axial load and the other for applying boundry conditions. I apply a point force to the middle of the plate. It seems so simple!

However, when I run the model at the very first step I come to many errors and warnings as :

(*) Warning: Loss of at least 7 digits in reducing diagonal of equation: 1762, (node: 3021, dof_id: 1); value: 179383

(*) Warning: Loss of at least 7 digits in reducing diagonal of equation: 1768, (node: 3003, dof_id: 1); value: 100136

.

.

.

(x) CCMaterialExtendedAExc: CC5ParamYieldF::project_stress_on_f - division by

Could anyone provide some comments to solve the problem?

Respects

Thank You very much.]]>

In ATENA GiD, you have to put a dimension of embedded reinforcement. What is the dimension of this embedded reinforcement and how this dimension affects the analysis? I have done some trial analysis with different dimensions and the results vary significantly with the dimension.

In modeling the bond of reinforcement, what does it mean by confined and uncofined concrete? In theory manual, it says..unconfined (failure by splitting of the concrete) and confined (failure by shearing of concrete between the ribs). If I am modelling a beam with shear reinforcement and ribbed bar, will it be counted as confined or unconfined?

If the mesh size is 50 mm and estimated crack spacing is 100mm, then will it make any difference by using the "activate crack spacing" function?

Thanks.

]]>I am simulating the interface shear test example from the manual using ATENA studio, and pre-processing in GiD. To study the effect of shear connectors on the interface, I'm modelling reinforcement perpendicular to the interface. However I'm getting same results as in the model without shear connectors. Any specifics/suggestions on how to model the shear connectors

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