Truss seat on an HEB 600 column with CHS braces

Truss seat on an HEB 600 column with CHS braces

A truss chord is seated on an HEB 600 column while CHS 219.1 braces join the same node. Plates 15–30 mm and bolts from M16 to M30; the bolts govern at 83 % of capacity.

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From a real projectAISC 360-16Checked: all components OK
Truss seat on an HEB 600 column with CHS braces: overall check of the finite element model

The 3D model is the connection as it was checked: members, plates, welds and bolts. Drag to rotate, scroll or pinch to zoom, tap a part type to hide it.

Members
HEB 600 (S275), CHS 219.1×5.0 (S235)
Plates
15–30 mm thick
Bolts
M16, M20, M24, M30
Welds
fillet, throat 5.7–10 mm
Design code
AISC 360-16
Method
Component-based finite element model (CBFEM)
Plates (plastic strain)0.3 / 5 %
Local deformation0.1 / 3 %
Bolts83.4 / 100 %
Welds76.6 / 100 %
Truss seat on an HEB 600 column with CHS braces: equivalent stress in the plates and members
Equivalent stress under the governing load case.
Truss seat on an HEB 600 column with CHS braces: overall check with plastic strain
Overall check: plastic strain and component status.

How it was checked

Every plate, bolt and weld in one model

The joint is modelled with shell elements for the plates and member ends, and with nonlinear springs for bolts, welds and anchors (the component-based finite element method). The member forces are applied at the member ends and the model is loaded step by step to the full design load.

Plates pass when the plastic strain stays below the limit of the code; bolts, welds and anchors are checked against the component resistances of AISC 360-16. The bars above show each component’s utilisation for the governing load case.

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