Curved Viaducts

Discussion in 'FAQs' started by 60103, Jan 27, 2003.

  1. 60103

    60103 Pooh Bah

    If you have a viaduct with stone or brick arches on a curve, where do you put the extra bits that make it curved? Do you create arches wider at one side than the other or do you make the arches circular and have the piers trapezoid shaped?
    I'd go for the secong, but does anyone have a nearby prototype they could check?
  2. billk

    billk Active Member

    Hey David - Don't have a prototype to reference, but common sense tells me it would be a lot easier ti make the real thing using the second option!
  3. Mike R

    Mike R Member

    Hello, David;
    The bad news is, I think it's both columns and arches that taper.
    The idea being that radial lines from the simulated centerpoint of the curve radius are followed straight through.
    This is only my vague recollection from an engineering book from many years ago, and I don't have the book.
    The good news is, that since one can't really see both sides at the same time, it shouldn't matter if only the columns are affected.
    best regards / Mike:)
  4. cidchase

    cidchase Active Member

    Hi David,
    Here's a few pics, not very satisfactory for answering the
    question, I'm afraid.
    The curvature on the prototypes is probably more gradual than
    the model.
    I think for simplicity I would use the same arch profile on both
    sides, with the piers being trapezoidal. You can't really change
    the arch without strretching it or moving its center point down
    neither of which seem good options. Probably creating a
    cardboard mockup first would be helpful.
    BTW, I got better returns searching for "curving viaduct" than
    using "curved viaduct". Go figure.:) :) :)

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