Large structural frame that has permanet deflections. How to repair?
Large structural frame that has permanet deflections. How to repair?
(OP)
I am looking at a large steel frame with an internal plated chamber supported by the steel framework. The rectangular chamber is about 100ft by 20 ft by 75 ft high. There was an overpressure that has caused the plates and the structure to permanently deform. The customer wants to fix rather than replace the columns since there is so much connected to them. If we pull/push on the columns to correct the deflection, which is on the order of 4 to 5 inches over the 75 foot height, do you reinforce the columns to account for the loading needed to have caused the deflection? The columns are 18 inch diameter HSS shapes and W12 X 65's so the loading needed to correct these members is significant. Thank you






RE: Large structural frame that has permanet deflections. How to repair?
RE: Large structural frame that has permanet deflections. How to repair?
RE: Large structural frame that has permanet deflections. How to repair?
I would also look very carefully at the option of using any/all members without staightening them.
RE: Large structural frame that has permanet deflections. How to repair?
Mike McCann
MMC Engineering
RE: Large structural frame that has permanet deflections. How to repair?
RE: Large structural frame that has permanet deflections. How to repair?
One also has to have something to push or pull against.
If the operating performance of the system is not affected by this deflection you have now, maybe installing sister columns at each deflected col and connected to it so that it picks up the load in the damaged col might be the more economical fix.
May have to do some creative design at the fdn, though.
All other members/connections should be checked also for damage.
RE: Large structural frame that has permanet deflections. How to repair?
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Large structural frame that has permanet deflections. How to repair?
RE: Large structural frame that has permanet deflections. How to repair?
RE: Large structural frame that has permanet deflections. How to repair?
This would be a good time to install pressure and vacuum relief valves, with appropriate fixed settings.
I would go so far as to conceal or disguise them to reduce the probability of removal.
Mike Halloran
Pembroke Pines, FL, USA