huangyhg

rigid base plate design
g'day,
just in need of a decent reference for the design of rigid base plates for hot rolled sections. all of the standard design guides avaoid the issue on cost basis, however i have to design one.
do i simply do a standard design with additional bolting outside of the column area and apply a large factor of safety to the loads/moments that need to restrained or is there actually a straight forward method for design.
any help or guidance is appreciated.
regards
sc
check out our whitepaper library.
sc...the american institute for steel construction (aisc) gives a straightforward method of baseplate design in the asd manual, 9th edition. the method given in the 9th edition has a bit more explanation than that of the older editions, but the process is similar.
some additional references for base plates that also address applied moments:
1. design of welded structures, blodgett
2. aisc design guide 1, column base plates
3. "beam-column base plate design", aisc eng. journal, q1 1999
sc,
in rigid base plates the tension in the anchor bolts is large, and that requires thick base plates and heavy welding of the column to the base plate.
a type of base plate more appropiate for a rigid column base is shown on page 4-131 of the aisc's "manual of steel construction", 9th edition. in this detail, the tensile force is transmitted to the anchor bolt through stiffener plates welded to the column, and the base plate itself is designed only for bearing.
hope this will help
aef
the references given by taro are excellent, and provide an excellent methodology to base plate design. i would add one more to the list:
"steel structures: design and behavior" 2nd edition, by charles g. salmon and john e. johnson. newer editions of this book refer to the 2nd edition and to blodgett, so you will need to find it used ( i found mine through amazon) or perhaps a senior colleague will have a copy. this is what i use for base plate design.
see aisc "steel design guide series" book #1 - column base plates.
sc,
i have a mathcad 2000 template that does the calculations for the method described in omer blodgett's book. if you'd like a copy, email me at
g'day sc,
thanks dbuzz,
i've already been in contact with them and had a reasonably poor response along the lines of are you a member? if not join and we will be able to provide better assistance via our library otherwise purchase a book from our list.
so i had a look at the list available and determined that what was offered was along the lines of pinned bases with very little guidance offered on rigid base design. i refuse to join just to access their library (which by all reports is excellent) once or twice a year.
i have since carried out the design in accordance with as4100 and placed all bolts outside of the flanges, along with a "thick" base plate and "thick" gussets. the design is based on reducing deflection/distortion of the base plate to an absolute minimum, increasing the hold down ability of the bolts (by a fs of 3) and ensuring that the
you may want to download the document at:

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