Straightforward question: if you have a diaphragm braced on 3 sides, is there a chord force generated when the load is parallel to the single brace? It seems to me that, no, there is not, but rather 2 perpendicular shears that restore the torsional moment (possibly generating collector forces through the diaphragm). But no true chord force. I've seen people analyze the situation as a cantilevered beam, but the analogy breaks down at the 1-sided brace: where the chord force is highest, the chord terminates and nothing is there to resist the force. I've never seen this addressed in a reference.
If there is not a chord force in a 3-sided diaphragm, I have a follow-up question for a typical (4-sided braced) diaphragm.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.