Composite beams are designed using a set of design forces obtained from 3D Analysis. (Grillage Chasedown Analysis and FE Chasedown Analysis results are not required.)
The beams must be simply supported, single span unpropped structural steel beams.
The following are beyond scope:
- continuous or fixed ended composite beams,
- composite sections formed from hollow rolled sections,
- composite sections where the concrete slab bears on the bottom flange,
- the use of fibre reinforcement.
Beams are designed for gravity loads acting through the web only. Minor axis bending and axial loads are not considered.
Note: If either minor axis bending or axial loads exist which exceed a limit below which they can be ignored, a warning is given in the beam design summary.
Profiled steel sheeting can be perpendicular, parallel and at any angle in between relative to the supporting beam web.
Tekla Structural Designer will determine the size of beam which:
- acting alone is able to carry the forces and moments resulting from the Construction Stage,
- acting compositely with the slab using profile steel decking (with full or partial interaction) is able to carry the forces and moments at Composite Stage,
- acting compositely with the slab using profile steel decking (with full or partial interaction) is able to provide acceptable deflections, service stresses and natural frequency results.
Alternatively you may give the size of a beam and Tekla Structural Designer will then determine whether it is able to carry the previously mentioned forces and moments and satisfy the Serviceability requirements.
An auto-layout feature can be used for stud placement which caters for both uniform and non-uniform layouts.
