Shear studs for diaphragm forces

[EngrRC]

Does anyone have a reference for designing shear studs in composite metal decking for diaphragm forces?

I have tried multiple sources but I could only find guidance on designing shear studs for gravity load.

 

[WillisV]

This has been addressed in Chapter I of the last few AISC specification editions

 

[EngrRC]

WillisV, yes it was addressed, but it is unclear to me how you design the studs. Are you supposed to use the same .85fc' formula?

 

[Hokie93]

An article titled "Under Foot" from the December 2008 issue of Modern Steel Construction magazine might be helpful. The article is by Susan Burmeister and William P. Jacobs and is available free of charge at

http://www.modernsteel.com.

 

[Hokie93]

NEHRP Seismic Design Technical Brief No. 5 (Seismic Design of Composite Steel Deck and Concrete-Filled Diaphragms - A Guide for Practicing Engineers) by Sabelli, Sabol, and Easterling gives some treatment to this topic. This document is available free of charge at

https://www.nehrp.gov/library/techbriefs.htm.

 

[WARose]

I generally just superimpose the required force from composite action (if any) onto the diaphragm forces. Then compare that to the allowable per stud.

 

[EngrRC]

WARose, how do you determine the demand force going into the studs? Do you take per linear length of diaphragm force or integrate over a certain region or what?

I am actually working on a truss bridge with composite metal decking

 

[WARose]

WARose, how do you determine the demand force going into the studs? Do you take per linear length of diaphragm force or integrate over a certain region or what?

I (generally) distribute the shear force in the diaphragm on a per linear foot basis. (If, say, we are talking transferring something like shear to a shear wall.)