Question Hello Sir,
Could you help me with this problem:
Consider 2 concrete sections; First one is an I beam as a unit cross section, and the other one is an I section again but this time with 2 parts in which the bottom part of the section is not connected to the upper part (so in this case we have a T beam and the bottom part). How can you explain the structural behavior of these two different sections when they act as beams?
Answer Dear Hessam
When no connection exist between 2 parts then no shear exists between them . Then they perform independently. Then in your example the moment resistance of the non connected I beam is equal to moment resistance of a T shape beam + the moment restance of a narrow rectangular beam which is different in respect of an integrated I beam. The I beam resistance is greater in regular situation.
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