Modelling RCC fixed joint

[cramanayaka]

Hi folks;

I am learning how to model a concrete frame – with fixed joints - properly. I am not sure which position (Position 1 or Position 2 in Figure1) is the correct location to connect a beam with a column. Please see Figure 1.

I have seen many instructions connecting beam to the column center (Position 1) as shown in Figure 2. However, then the 3D view (Figure 3) looks funny because the beam does not continue until the column edge.

Thus, I connected the beam to Position 2 (Figure 4). The 3D view looks realistic (Figure 5), but the analytical view looks different (Figure 6).  Would you please explain to me which one is correct to represent the load transfer of a fixed joint?

Thanks
Chamil

[Artur.Kosakowski · Accepted solution]

Hi @cramanayaka

Imagine that you just defined your profiles by their properties such as cross sectional area and moments of inertia which are good enough to run static calculations and you assigned no real shapes to them 

The analytical representations of beams and columns are just lines and they should 'meet' in the common nodes. The shapes are just to see what the profiles are as you work with bar elements rather than solids. The Fig. 6 would be a beam plus a cantilever.

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