/// <summary>
/// Calculating eccentricity cose by II order
/// </summary>
public void Calculate()
{
ei = ElementGeometry.li / 400;
e0 = new List <double>()
{
ElementGeometry.h / 30, 20 / 10.0
}.Max();
if (ElementGeometry.λ > λ_lim)
{
//// drugi red
var ρ = 0.01;
var n_bal = 0.4;
var n = Forces.NEd / (ElementGeometry.b * ElementGeometry.h * Material.beton.fcd / 10);
var nu = 1 + (ρ * Material.armatura.fyd / Material.beton.fcd / 10);
var Kφ = 1;
var Kr = (nu - n) / (nu - n_bal);
Kr = Kr >= 1 ? Kr : 1;///if Kr>=1 then use it else use 1
var t1 = (Material.armatura.fyd * 10 / (Material.armatura.Es * 1000));
var t2 = (1 / (0.45 * (ElementGeometry.h - ElementGeometry.d1)));
var Ko = (Material.armatura.fyd / (Material.armatura.Es * 100)) * (1 / (0.45 * (ElementGeometry.h - ElementGeometry.d1)));
var K = Kφ * Kr * Ko;
e2 = K * Math.Pow(ElementGeometry.li, 2) * 1 / Math.Pow(Math.PI, 2);
}
MEd = Forces.MEd(e2);
}