ANCHORS BOLTS IN CONCRETE

[cesarsosa]

I HAVE TO DESIGN THE ANCHOR BOLTS FOR A NON-BUILDING STRUCTURE. It is a STEEL "T" SUPPORT WITH CONDUIT LOADS AND SOME PIPING LOADS TOO. QUESTION:
FOR ANCHORS BOLTS DESIGN (HILTI OR SIMILAR) SHOULD i COMBINE:
1) Earthquake horizontal "X" direction + Earthquake horizontal "Y" direction + Vertical

or
2a)Earthquake horizontal "X" direction + Vertical
and
2b)Earthquake horizontal "Y" direction + Vertical

I appreciate any response to this question. Also, it would be great the Code Reference and section.

Thank you so much,
Cesar

 

[Ron]

I think it would be a good idea for you to actually research the code for which you are required to comply and understand the load combinations. I would suggest three codes if you are in the US....ACI 318 (Appendix D), ASCE 7 and the International Building Code (assuming you don't have a specific state code).

This forum will not be there in a meeting with you when you have to explain what you've done, particularly if something goes wrong.

 

[Ron]

Also...most codes require that you consider the worst case (if predictable) when you analyze for loading.

 

[Teguci]

Just like wind loads, quake loads don't care what the orientation of your structure is. Total seismic shear, Vq = SQRT(Vqx^2 + Vqy^2). If your code is quiet on this, I would suggest at least the SQRT(2)/2 case for both combined directions Vqx and Vqy.

Don't forget vertical effects from seismic as well.