Good Morning,
I am working on a job with very sensitive deflection criteria for sustained loading. This is a steel building and we are using composite girders. It hit me the other day that using composite girders would open us up to long term creep deflections, not just for the SDL (which is being installed after the glazing; the reason for these tight criteria), but also for the self weight of the structure.
I looked online for guidance on estimating creep deflections of composite girders, but found very vague guidelines, like "estimate 15% additional deflection". With such tight criteria, I am hoping to find some more established guidance.
It is unfortunately not an option to avoid using composite girders alltogether; there are also very tight criteria for deflections due to transient loads, and depth limitations that mean we cannot give up the contribution from composite action here.
If you have any resources / references or have come accross this problem in the past, I would appreciate any input hugely.
Thank-you so much in advance.
I am working on a job with very sensitive deflection criteria for sustained loading. This is a steel building and we are using composite girders. It hit me the other day that using composite girders would open us up to long term creep deflections, not just for the SDL (which is being installed after the glazing; the reason for these tight criteria), but also for the self weight of the structure.
I looked online for guidance on estimating creep deflections of composite girders, but found very vague guidelines, like "estimate 15% additional deflection". With such tight criteria, I am hoping to find some more established guidance.
It is unfortunately not an option to avoid using composite girders alltogether; there are also very tight criteria for deflections due to transient loads, and depth limitations that mean we cannot give up the contribution from composite action here.
If you have any resources / references or have come accross this problem in the past, I would appreciate any input hugely.
Thank-you so much in advance.