public static double ElastSectModTop(double bft, double tft, double D, double tw, double bfb, double tfb)
{
Ytf = NCProperties.PartCG(tfb, D, tft);
NA = NCProperties.NeutralAxis(bft, tft, D, tw, bfb, tfb);
I = NCProperties.MomentOfIneria(bft, tft, D, tw, bfb, tfb);
Stop = I / (Ytf - NA + tft / 2);
return(Stop);
}
public static double ElastSectModBot(double bft, double tft, double D, double tw, double bfb, double tfb)
{
Ybf = NCProperties.PartCG(0, 0, tfb);
NA = NCProperties.NeutralAxis(bft, tft, D, tw, bfb, tfb);
I = NCProperties.MomentOfIneria(bft, tft, D, tw, bfb, tfb);
Sbot = I / (NA - Ybf + tfb / 2);
return(Sbot);
}
public static double MomentOfIneria(double bft, double tft, double D, double tw, double bfb, double tfb)
{
Atf = NCProperties.PartArea(bft, tft);
Aweb = NCProperties.PartArea(D, tw);
Abf = NCProperties.PartArea(bfb, tfb);
Ytf = NCProperties.PartCG(tfb, D, tft);
Yweb = NCProperties.PartCG(tfb, 0, D);
Ybf = NCProperties.PartCG(0, 0, tfb);
NA = NCProperties.NeutralAxis(bft, tft, D, tw, bfb, tfb);
Itf = NCProperties.PartMomOfInert(bft, tft);
Iweb = NCProperties.PartMomOfInert(tw, D);
Ibf = NCProperties.PartMomOfInert(bfb, tfb);
I = Itf + Atf * Math.Pow(Ytf - NA, 2) + Iweb + Aweb * Math.Pow(Yweb - NA, 2) + Ibf + Abf * Math.Pow(Ybf - NA, 2);
return(I);
}