Column beam joint stiffnesses

[komodo]

hello, how do we adjust column beam joint stiffness in idecad? There were options such as fully rigid, semi-rigid and non-rigid in sta4cad. Is there such a thing in idecad? good work

 

[HakanŞahin]

hello, how do we adjust column-beam joint stiffnesses in idecad? There were options such as full rigid, semi-rigid and non-rigid in sta4cad. Is there such a thing in idecad? good work[/quote ] Hi, with ideCAD, you can make beam-column connections; fully rigid, semi-rigid and articulated. You can also change the length of the rigid arm inside the column. Moreover, there is a "Rigidity Reduction" tab in the beam and column settings. The stiffness reduction ratio can be given on the basis of loading. If this is the case If you are asking the question in reference to TDY article 3.2.3, it is sufficient to select the option in the "cracked section corrosion" tab in the beam settings. If the option is left checked, the stiffness of the beam between two curtains is automatically reduced by 50%. Also, in the Freedoms tab in the beam settings, the left or right side of the element is selected. For the tip, the spring value can be defined based on the tip displacement (freedom).

 

[komodo]

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so idecad's default settings are that column-beam connections are infinitely rigid. me? It is written in the books that the variable section is more accurate, do you change the default settings in your projects with simple frame systems?

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[HakanŞahin]

Hello, beam-column combinations with ideCAD; You can make it fully rigid, semi-rigid and articulated. You can also change the length of the rigid arm remaining inside the column. By changing the d1, d2 lines in the beam settings, the rigid arm length in the column-beam region can be changed. If the value is given as the distance from the column to the beam theoretical point, the rigid arms are canceled. The green line visible on the screen shows the considered rigid region from the column midpoint to the point where the beam midpoint cuts the column. (D1 and d2=0 at the moment the beam is entered. There is a rigid region) This region has been removed in the lower beam. (The rigid region is canceled by entering d1=20, d2=20 cm.) When any value is entered, you change the length of the region as much as the rate created by that value.

 

[komodo]

Hi, with ideCAD, you can make beam-column connections as fully rigid, semi-rigid and articulated. You can also change the length of the rigid arm remaining in the column. The length of the arm can be changed. If the value is given as the distance from the column to the beam theoretical point, the rigid arms will be canceled. The green line that appears on the screen shows the considered rigid region from the midpoint of the column to the point where the midpoint of the beam cuts the column (d1 and d2=0' when the beam is entered. There is a rigid region) This region has been removed in the lower beam (by entering d1=20, d2=20 cm, the rigid region has been cancelled.) When any value is entered, you will change the length of the region as much as the rate created by that value.

thank you very much. sta4cad How do we define the semi-rigid region as in the following? I guess it's being taken? Do you change these numbers in your models?

 

[komodo]

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it says "stiffness reduction 1" in the image you sent. what does it mean?

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[komodo]

greetings, how do we adjust column beam joint stiffness in idecad? There were options such as fully rigid, semi-rigid and non-rigid in sta4cad. Is there such a thing in idecad? good work

beam-column connections with ideCAD; You can make it fully rigid, semi-rigid and articulated.

here's how we do it?

 

[Ismail Hakki Besler]

greetings, how do we adjust column beam joint stiffness in idecad? There were options such as non-rigid. Is there such a thing in idecad? Good work

You can make beam-column combinations with ideCAD as fully rigid, semi-rigid and articulated.

how do we do that?

Hakan by determining the freedoms on the freedoms screen in the brain's response.

 

[komodo]

[/quote] Hakan's response is by determining the freedoms on the freedoms screen.[/quote] My question is not how much moment the column-beam junctions will transmit, but how much of the column-beam junctions will be rigid. From here in etabs-sap2000 programs;

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from here in sta4cad;

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we can set this combination as "semi-rigid". How can we set up İdecadde? i.e. I want to make the joint semi-rigid, not semi-joint.

 

[Levent Özpak]

my question is not how much moment the column-beam junctions will transmit, but how much of the column-beam junctions will be rigid.

Hello, as Hakan Bey said, the column-beam junctions in the program are infinite by default. It is accepted as rigid, beam moments are calculated from the column face. For example, the rigid arm distance of a beam connected to an 80/80 column in the example in the same direction and axis is 40 cm. To reduce this distance by 50%, the beam properties must set the distance d1 in the static/reinforced concrete tab by 20 It is enough to enter cm. Good work

 

[levent]

I think there is a problem due to not fully understanding the union logic. Please correct if there is an error in the definition I will make below. Essentially, the junction of the column and beam is not fully rigid or semi-rigid unless you intervene. Column beam junction has 6 degrees of freedom so that it can make 3 translations and 3 rotations. Since the columns and beams are modeled with rod elements, Idecad connects the columns and beams with rigid arms to take into account the volume arising in the width and length of the column and beam elements we model. For example, in the example given by Levent Özpak (column in size 80*80), it must go 40 cm inside the column in order for the beam to reach the nodal point where the column and beam meet. At this 40 cm distance, there is no need to calculate and design the moment and shear force (when there is no need to calculate, external controls are made at the junction points), so this place is defined as a rigid arm. As a result, if there is no special situation in classical column-beam combinations for reinforced concrete structures, I think there is no need to change the model made by idecad. I hope that has been revealing.