Increasing the allowable load on a steel/concrete composite floor system

[fne]

If new beams are introduced to an existing composite floor system, how are the design of the new beams and verification of existing handled? How does the introduction of the new non-composite beams affect the existing composite members?

 

[r13]

You need to create a construction scheme that ensure the new beam will be engaged with the existing system in order to be effective. From that point on, he analysis and design has no difference from the routines.

 

[Agent666]

If the beams are the limiting factor, then often strengthening the existing beams is the most cost effective solution.

If its the slab/deck then depending on how much you need to strengthen the use of carbon fibre or similar techniques may be effective in getting you over the line. You're unlikely to get 200% increase in capacity, but it really depends on the actual loads you have.

What exactly is driving you to add beams, what is failing exactly, how much are you trying to increase the capacity by?