Staged Construction

[Nodan]

Hello all,

Sould I use staged construction (sequential construction) only in service level combination?

Or should I also include them in ultimate level combinations and use for design? I think I should because I get positive moment values at the ends of 20th storey internal beams of a RC building with non-staged (regular) dead load case.

What do you think?

 

[BAretired]

How is that possible?

BA

 

[jimstructures]

I would like a more complete description of what you think is the problem or question. I don't understand what do are doing or maybe asking.

Jim

 

[Guest262653]

You should use it for ultimate limit state as well. As you know, since you are already using it for service load analysis, those moments are not real and arise from unrealistic differential axial shortage of columns and cores, so a proper staged construction analysis (or an equivalent method) should be used.

 

[Nodan]

For example if the LRFD load combination is 1.2D + 1.6W + L+ 0.5S, will we replace Dead load with sequential load and obtain 1.2D_SQ + 1.6W + L+ 0.5S? I am omitting super dead loads here.