Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Seismic Lateral Load

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Thanks Christopher, that's also one of the things that I'm planning to


Christopher Wright wrote:
> >Do I have to apply
> >the Fx (determined node load)to all joints at the same level or divide
> >the Fx by the number of joints on that same level.
> This is a good rule for any finite element software when you're not
> absolutely certain how it will apply loads--
> Make a simple model with loads applied the way you suppose they should
> go. Check the reaction forces and moments (all six equilibrium equations)
> against what you think the input loads should be. If the reactions
> equilibrate the applied loads within 5 significant figures, you got it
> right. Checking within three significant figures is usually ok, but might
> want further checking (like the effect of arcs modelled as chords) to
> make sure it's not an input error. Less than three figures means bad
> software or input problems.
> I've found hundreds of my own (and other people's) mistakes, program bugs
> and documentation errors this way. And, 30 years after my last mechanics
> class, boy, can I draw free-body diagrams. ;->
> Christopher Wright P.E.    |"They couldn't hit an elephant from
> chrisw(--nospam--at)        | this distance"   (last words of Gen.
> ___________________________| John Sedgwick, Spotsylvania 1864)