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  1. Carnegie

    Use of girder distribution factor in EXTREME EVENT II

    I'm designing a connection for a guide rail post to a fascia beam. I'm using design criteria from AASHTO LRFD Bridge Design Specs. A13.2. I have the load combinations as 1.25(DC2)+0.5(LL_IM)+1.0(CT) as per table 3.4.1-1. The question is would I add in the girder distribution factor to the...
  2. Carnegie

    Soil plug formation for short piles

    I am a structural engineer designing a footing on H-piles driven to bedrock. If the piles are considered short piles (I'm using Brom's criteria) should I ignore the formation of a soil plug for calculation of the geotechnical tip resistance? Thanks.
  3. Carnegie

    Sheet pile for scour protection

    We’re trying to resolve the forces acting on a sheet pile wall. If you look at the attached pdf we believe the effective width of the concrete arch and the soil wedge of select structural fill on top of the arch can be analyzed as a line load distributed through the 8’ footing. We’re not so sure...
  4. Carnegie

    Using MathCAD to find point of zero shear

    I'm trying to set up an equation in MathCAD to find the point of zero shear in a sheet pile wall. It returns an imaginary number. If you look on step 5 of the attached pdf it returns an answer of y-12.87ft when reduced to a workable quadratic equation. I'm trying to skip this step and solve for...

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