composite beam

[Kashima]

I'm trying to derive the slope equation for a composite beam. I've calculated "I" by using the equivalent area method. Which "E" would I use? Would I have to find an equivalent "E"?

Many thanks.

 

[Ron]

Yes.

 

[Kashima]

I've been trying to calculate the equivalent "E", but I'm not sure how to go about it. I appreciate the help.

 

[dik]

Use Es or Ec and a transformed section with ratio n = Es/Ec.

 

[WillisV]

For a composite beam, EIeffective needs to be calculated to take into account partial composite action. See the Commentary to Chapter I of the AISC specification.