Subject:
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Re: Large arch bridge geometry - help!
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 4 Jul 2002 21:18:35 GMT
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Viewed:
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457 times
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In lugnet.technic, Thomas Avery writes:
> In lugnet.technic, Pedro Silva writes:
> > Hi all,
> >
> > I am attempting to design a large ached bridge with technic parts, and this
> > means I'll need plenty of reading on the subject of beam-geometry. Can any
> > of you guys help me out in my research?
>
> ROSCO is right, you should think in terms of beam lengths. Your thought
> process should be similar to how it's actually built. In other words, you
> build your beams in certain lengths first and then put them together to form
> the bridge. The angles they form are a function of the lengths.
>
> I've developed two spreadsheets to help design my bridges. You can find them
> here:
> http://www.texbrick.com/files/
>
> The user inputs the member lengths, and then the spreadsheet calculates the
> angles. The bridge is displayed graphically so you can see what you're
> building. You start with the center of the bridge and work your way to the
> right support (assumes your bridge is symmetric about the center).
>
> As you work your way from the center, you input each member length and then
> see the results graphically. The spreadsheet also displays the angles the
> members make with respect to horizontal or vertical (so you can try to get a
> level memeber, it needed).
>
> I hope this helps.
It helps A LOT!!!
Thanks, TJ. I'll be working with this during the holidays, to see what I can
design. Now I must find the actual measurements of the bridges, to be more
accurate with my project - but that is the easy bit :-)
Fantastic page, BTW.
Pedro
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Message is in Reply To:
 | | Re: Large arch bridge geometry - help!
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| (...) ROSCO is right, you should think in terms of beam lengths. Your thought process should be similar to how it's actually built. In other words, you build your beams in certain lengths first and then put them together to form the bridge. The (...) (22 years ago, 4-Jul-02, to lugnet.technic)
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