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Re: modeling composite beams in SAP2000

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Just an additional note:
I experienced that is better to not have too much
nodes along the beam. I prefer the minimum distance
between nodes to be around 5 times of the beam depth.
Frank


--- Majid Sarraf <msarraf(--nospam--at)unl.edu> wrote:
> 
> I have had a good success in using SAP2000 to model
> composite girders. In 
> fact I verified the results by checking them against
> field measurements, 
> and they are in very good agreement.
> 
> The key issue in modeling composite action is to
> constraint only pair of 
> nodes with different labels, and not all concrete
> nodes to those of steel 
> top flange with one lable. So it would be a bit
> tedious to define different 
> constraint for every pair if you have too many nodes
> along the girder. The 
> best way then is to go to *.s2k file and use a
> pre-processor program to 
> compile constraint section of the input file.
> 
> Majid Sarraf
> 
> National Bridge Research Organization (NaBRO)
> www.Nabro.unl.edu
> 
> At 10:14 AM 6/13/00 -0700, you wrote:
> >Dear Leopoldo,
> >As far as m experiences, an easy way is just define
> an
> >equivalent section and go ahead by that. Although
> to
> >model steel and concrete parts together, you can
> >define two element, but the output generated by SAP
> >design module won't be accurate enough. Because the
> >model doesn't have an accurate definition of a
> >composite beam.
> >Good luck,
> >Frank
> >
> >--- Leopoldo Sanz <leopoldosea(--nospam--at)hotmail.com> wrote:
> > > Dear friends:
> > > Is it possible to model composite beams in
> SAP2000
> > > without doing hand
> > > calculations? May I simply specify effective
> width,
> > > slab concrete f'c, E,
> > > etc.? Where?
> > > Thank you very much
> > > Yours,
> > > Leopoldo Sanz
> > >
> >
> >=====
> >Fariborz Tehrani,                      Phone:
> (310)509-8826
> >Civil Engineer                           Fax:
> (530)481-9532
> >BSCE, MSCE, PE                    Voice Mail:
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> >
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=====
Fariborz Tehrani,                      Phone: (310)509-8826
Civil Engineer                           Fax: (530)481-9532
BSCE, MSCE, PE                    Voice Mail: (877)743-6206
email: fmtehrani(--nospam--at)msn.com
web: www.fmtehrani.com

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