DSPE01
Civil/Environmental
- Nov 17, 2010
- 7
WE ARE RELOCATING EXISTING COLUMNS ON A TRANSIT STRUCTURE. THE EXIST. COLUMNS ARE DIRECTLY BELOW THE END OF THE GIRDERS. THE CONTRACT DOCS HAVE US INSTALLING NEW COLUMNS CONNECTED TO THE GIRDER END FOLLOWED BY REMOVAL OF THE OLD COLUMN. THE HEAVIEST COLUMN DEAD LOAD IS AROUND 275K. ONCE THE NEW COLUMN IS ERECTED, ON THE (4) 1 1/4" ANCHOR RODS, I WOULD LIKE TO USE THE LEVELING NUTS TO TRANSFER PART OF THE LOAD TO THE NEW COLUMNS.
QUESTION
1 - DO YOU THINK TRANSFERRING 50% OF THE DEAD LOAD PRIOR TO CUTTING OUT THE OLD COLUMN IS OKAY (AS THE OLD COLUMN IS CUT, THE BALANCE OF THE LOAD IS NATURALLY TRANSFERRED. ALSO THE EXISTING LOADING IS TOUGH TO FIGURE ACCURATELY.
2 - I AM THINKING THAT TURN OF THE NUT APPROACH IS THE ONLY WAY TO FIGURE OUT HOW MUCH LOAD IS TRANSFEERED (TURN OF THE NUT = PITCH DISTANCE => APPLIED STRAIN => STRESS => FORCE IN NEW COLUMN)?
QUESTION
1 - DO YOU THINK TRANSFERRING 50% OF THE DEAD LOAD PRIOR TO CUTTING OUT THE OLD COLUMN IS OKAY (AS THE OLD COLUMN IS CUT, THE BALANCE OF THE LOAD IS NATURALLY TRANSFERRED. ALSO THE EXISTING LOADING IS TOUGH TO FIGURE ACCURATELY.
2 - I AM THINKING THAT TURN OF THE NUT APPROACH IS THE ONLY WAY TO FIGURE OUT HOW MUCH LOAD IS TRANSFEERED (TURN OF THE NUT = PITCH DISTANCE => APPLIED STRAIN => STRESS => FORCE IN NEW COLUMN)?