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Saw an image of a gas station canopy toppled due to hurricane Idalia and damage to the structure and the pumps.
It must be noted that I have never had the pleasure of researching and designing this type of structure. However, I have had to design structural assemblies that required a failure mechanism.
My first thought "there needs to be a designed failure mechanism that sacrifices a component, but keeps the structure intact during significant wind events."
Note: There is actually some back and forth in my head as I think through this, so do not judge me. It is my process! LOL!
Next thought (NT) 1: Fasteners or bolts where the overhead structure meets the posts. Pushback (PB) 1: Uncontrolled large flying structure. Too risky.[Additional thought-Chain it down so it only travels so far. PB to AT1: UNCONTROLLABLE. May create a loading scenario worse than uplift.)
NT2: Fasteners, but save primary structure let panels release. PB2: See PB1
NT3: Fasteners, with smaller panel sections. Let smaller sections go, nobody should be out in this weather. PB3: Still too risky, IMO.
NT3: Fasteners at boundaries only with hinges that hold Allow structural panels to give or let wind pass in the wind event. Gravity based loading carried in bearing. Flapping Panels. PB3: (Working on it).
Note: Have not participated in a while due to work. Wanted to share my thoughts.
Interesting thoughts, but I agree with your PB concerns. Any flying debris becomes problematic for downwind structures. I used to design cell towers, and we had one fail during a hurricane. Not because the tower couldn't handle the wind loads, but because of the failure of an upwind metal building. The metal siding and/or roof panels hit our tower and stuck, turning a skeletal structure into a wall. Sheared off the solid round bar legs of the tower.