Removing Temporary Steel Column 2

[asixth]

Hi

I have a temporary steel column (310UC158) that will need to be removed in the future. The column we be approximately 2,000kN (450kips) in compression and I am expecting the structure above to deform approximatley 2.0mm (1") when the column is removed. How would the column safely be removed? I was hoping to heat the steel so that it would soften and deform whilst still loaded and can be sefely removed. Has any done anything similar to this or have any recommendations?

 

[PEinc]

Archie264, FYI, we had no strain gauges on the beams or columns but the building was monitored for vibrations, noise, dust, etc. My big concern was the weldability of the 1925-ish riveted steel column. (See my previous thread in the Welding, Bonding Fastener Engineering Forum.) We had the column steel tested and everything was OK for welding. Interestingly, while the column design load was indicated by the geotech to be 425 kips, I calculated it to be only 346 kips but designed for their 425 kips because it's hard to accurately calculate the weight of Ming vases, a masonry Hindu Temple, and other treasures inside the museum. When we jacked the column, it started to move at only 240 kips. That doesn't surprise me because the live load was probably only half of the design load per SF and there was no snow on the roof. 240 kips was a reasonable actual load.

http://www.PeirceEngineering.com

 

[paddingtongreen]

I repeat, use the sand jacks, they are cheap and effective, they let the load down relatively gently. Using heat can cause sudden failure from buckling unless it is evenly applied all through the material. Why jack the beam up afterwards, that is a lot of unnecessary work.

Michael.
Timing has a lot to do with the outcome of a rain dance.