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Recent content by JonnyFive

  1. JonnyFive

    Etabs area spring

    doh! solved it - remember to make sure analysis load case/combo is static non-linear!
  2. JonnyFive

    Etabs area spring

    Gents, Indeed it is important when considering uplift on base slab to ensure that the "soil" is not going into tension. So why is it, that when I model my basement structure (held in place with tension piles) and tick the non linear "compression only" box for an area spring I seem to get the...
  3. JonnyFive

    AASHTO 5.14.5.3 - Effect of hogging/sagging moments on shear check

    Hi, When you use AASHTO equation 5.14.5.3 which pertains to design for shear in slabs of box culverts - if you are checking the critical shear and it is at the location of a hogging moment (ie positive moment), you get an enhanced shear capacity? Convesrly, checking shear at midpsan of the...

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