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Behavior of diaphragm which has expansion joint

Behavior of diaphragm which has expansion joint

Behavior of diaphragm which has expansion joint

(OP)
Hi all! I am trying to understand the load path of the structure which has a diaphragm divided into two half due to expansion joint. Please refer attached picture for reference. Can anyone tell me what will be the load path for part B and how part B will still be stable? The structure has metal deck which acts as a flexible diaphragm. Don't we need to have lateral force resisting system at the both sides of the expansion joint? Please let me know if there is any additional design considerations that I need to be aware of.

RE: Behavior of diaphragm which has expansion joint

Generally you want a lateral system on both sides of the expansion joint. (3) sided flexible diaphragm is possible, but you gotta do a lot of extra work to get the shear and deflection right. Depending on the scale of the building and aspect ratio of the three sided diaprhagm there may not be a good solution.

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