public static double PNAtoTopCG(double bft, double tft, double D, double tw, double bfb, double tfb)
{
area = NCProperties.BeamArea(bft, tft, D, tw, bfb, tfb);
PNA = NCProperties.PlastNeutralAxis(bft, tft, D, tw, bfb, tfb);
PCGtop = (bft * tft * (tft / 2 + D + tfb - PNA) + tw * Math.Pow(D - PNA + tfb, 2) / 2) * 2 / area;
return(PCGtop);
}
public static double PNAtoBotCG(double bft, double tft, double D, double tw, double bfb, double tfb)
{
area = NCProperties.BeamArea(bft, tft, D, tw, bfb, tfb);
PNA = NCProperties.PlastNeutralAxis(bft, tft, D, tw, bfb, tfb);
PCGbot = (bfb * tfb * (PNA - tfb / 2) + tw * Math.Pow(PNA - tfb, 2) / 2) * 2 / area;
return(PCGbot);
}
public static double PlastSectMod(double bft, double tft, double D, double tw, double bfb, double tfb)
{
area = NCProperties.BeamArea(bft, tft, D, tw, bfb, tfb);
PNA = NCProperties.PlastNeutralAxis(bft, tft, D, tw, bfb, tfb);
PCGtop = NCProperties.PNAtoTopCG(bft, tft, D, tw, bfb, tfb);
PCGbot = NCProperties.PNAtoBotCG(bft, tft, D, tw, bfb, tfb);
Z = area / 2 * (PCGtop + PCGbot);
return(Z);
}