simple/hinge connection

[Gholamreza]

Hello engineers

I have a question about simple connection between beams and columns. Lets say I have a frame with 2 bays(spans). As I show below, i,j and k are the places for the columns which are connected with beam 1 and beam2. I want to have a beam between i and j (beam1) with rigid connection at both i and j and a beam between j and k (beam2) with simple(hinge) connection at both j and k.

i-----------(1)------------j----------(2)-----------k

Basically I want rigid connection at the left side of node j and simple/hinge connection at the right side of the node j.

How many nodes should I define at node j ? (2 or 3) ?
I defined one node at i and 2 nodes at j and also 2 nodes at k and used equaldof command but I am not sure if it is correct!

[Hwoarang]

Hi,

you should define 3 nodes at j node. So in the definition of the equaldof command, the middle node will be common for beam 1 and 2.

[Gholamreza]

I am not sure if I understand you correctly. If I define 3 nodes at j, how I can make sure the beam/column connection is rigid at the left side of the j and simple/hinge at right side of the j ?

[Hwoarang]

In this case, the definition of 2 nodes in j is sufficient. However, with the three nodes, the above modeling can also be performed.