public double GetWebPlastificationFactorForTensionRpt(FlexuralCompressionFiberPosition compressionFiberPosition)
{
double Rpt = 0.0;
double Mp = GetMajorNominalPlasticMoment();
double Myt = GetTensionFiberYieldMomentMyt(compressionFiberPosition);
double hc = Gethc(compressionFiberPosition);
double tw = this.Gettw();
ShapeCompactness.IShapeMember compactness = new ShapeCompactness.IShapeMember(Section, IsRolledMember, compressionFiberPosition);
double lambdaWeb = compactness.GetWebLambda();
double lambdapw = compactness.GetWebLambda_p(StressType.Flexure);
double lambdarw = compactness.GetWebLambda_r(StressType.Flexure);
//double lambda = hc / tw;
double lambda = compactness.GetWebLambda();
if (lambda <= lambdapw)
{
Rpt = Mp / Myt; //(F4-16a)
}
else
{
Rpt = Mp / Myt - (Mp / Myt - 1) * ((lambda - lambdapw) / (lambdarw - lambdapw)); //(F4-16b)
}
return(Rpt);
}
internal double GetRpc(FlexuralCompressionFiberPosition compressionFiberPosition)
{
double Rpc = 0;
double Mp = GetMajorNominalPlasticMoment();
double Myc = GetCompressionFiberYieldMomentMyc(compressionFiberPosition);
double hc = Gethc(compressionFiberPosition);
double tw = this.Gettw();
ShapeCompactness.IShapeMember compactness = new ShapeCompactness.IShapeMember(Section, IsRolledMember, compressionFiberPosition);
double lambdaWeb = compactness.GetWebLambda();
double lambdapw = compactness.GetWebLambda_p(StressType.Flexure);
double lambdarw = compactness.GetWebLambda_r(StressType.Flexure);
double Iyc = GetIyc(compressionFiberPosition);
double Iy = Section.Shape.I_y;
if (Iyc / Iy > 0.23)
{
if (hc / tw > lambdapw)
{
Rpc = Mp / Myc; //(F4-9a)
}
else
{
Rpc = Mp / Myc - (Mp / Myc - 1.0) * ((lambdaWeb - lambdapw) / (lambdarw - lambdapw)); //(F4-9b)
Rpc = Rpc > Mp / Myc ? Mp / Myc : Rpc;
}
}
else
{
Rpc = 1.0; //(F4-10)
}
return(Rpc);
}
public double GetLambdaWeb()
{
double Lambda = 0.0;
compactness = new ShapeCompactness.IShapeMember
(this.Section, this.isRolledMember, FlexuralCompressionFiberPosition.Top);
// for web location of compression fiber does not matter
Lambda = compactness.GetWebLambda();
return(Lambda);
}