Holding Down Bolt Design Method

[stephenebrady]

Hi,
I am involved in the design of a pressure vessel which has an unpressurised skirt at its base, and is subjected to overturning moments such that the vessel/skirt has a set of holding down bolts. (PCD circa 6000mm).
We currently use methods by Dennis R Moss in " Pressure Vessel Design Manual" but we are looking for an alternative to this procedure.

Any sugestions or examples of other methods for designing these? I am looking for designs for Individual chairs, chairs with compression rings, single and double gussets etc.

thanks in advance.

 

[dimjim]

Would bolts as used in bearings be of
interest to you for this application?
I assume your axis is vertical.
Have not seen the model that is used
in Pressure Vessel Design Manual so
I am not certain if they are the same
or different. I know that the bearing
bolting technology takes into consideration
of combined loading ie axial, moment, and
radial.

 

[stephenebrady]

Not sure dimjim, but yes the vessel is vertical, and is subjected to a combination of vertical load, horizontal shear load, as well as a BM and possibly torsion.
We use two methods, an "equivalent area" method and an eccentric load method.