huangyhg

another tricky question
ok all you structural analysis & design experts....i have the joy of analyzing & designing a stage / canopy that looks like a fine piece of oragami (see attached)
any suggestions on how to approach this one?
hmmmm, this one's so tricky, you can't even see it on the attachment - i'll try it again
is it a white line drawing ?
sorry boss: can't bring it up. check this: i'm not seeing any recognized extension (.pdf, .jpg, .doc .pps) on the "canopy" file.
see if that helps.
then again, an invisible orgami canopy is certainly lightweight, but you might have to worry about how to hold it down. 8<)
i don't know what's wrong with the attachment, so i'll try a picture this time...
i need to analyze and do a preliminary design of this canopy / stage. the architect wants to use precast panels for the upper structure, and there will be a cast-in-place concrete slab on the base.
funny, but when the architect built the model, they put a wire across the top to hold the one corner up (b/c it was tending to fall down), but we can't have any supports in the real structure, it is cantilevering out to the far corner.
i'll post one more picture after this one.
here's the other photo.
ps - the architect want panels & slabs to be as thin as possible.
we could put a rib on the outside edge if req'd and the end of the "box" can be solid, so i'm thinking a cantilevered triangular rib (along the outside edge), cast monolithically with a solid column / wall & a moment resisting base at the far end....
what is the material of the "wings"? you mentioned concrete for the "base" - is that the bottom "floor" only, or what the edges of each wing will be attached to?
indoor (stage only?) or exposed to real world wind and rain/snow/ice loads?
how tall to the points?
wings & walls are all precast, canopy is exposed to elements (freeze/thaw) etc., max dims are 25ft x 25ft (walls), 10ft high to platform level +/-. pad sits on the ground in a park.
my last attachment was a scanned pdf of photos, with mark-ups that explained all that, but i am having a "trouble with technology" day.
i'll try the pdf one more time....
to make it easier to discuss, i have numbered the nodes in the attachment. maybe i should have used letters. if you wish, i can change it.
ba
how can this architect sleep at night?
mike mccann
mmc engineering

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