public static Dictionary <string, object> ThresholdTorsion(ConcreteFlexureAndAxiaSection ConcreteSection, double N_u, double c_transv_ctr,
bool IsPrestressed = false, string Code = "ACI318-14")
{
//Default values
double phiT_th = 0;
//Calculation logic:
TorsionShapeFactory tss = new TorsionShapeFactory();
ConcreteSectionFlexure cross_Section = ConcreteSection.FlexuralSection as ConcreteSectionFlexure;
if (cross_Section != null)
{
if (cross_Section.Section.SliceableShape is ISectionRectangular)
{
IConcreteTorsionalShape shape = tss.GetShape(cross_Section.Section.SliceableShape, ConcreteSection.ConcreteMaterial.Concrete, c_transv_ctr);
ConcreteSectionTorsion s = new ConcreteSectionTorsion(shape);
phiT_th = s.GetThreshholdTorsion(N_u) / 1000.0; //Conversion from ACI psi units to ksi units
}
else
{
throw new Exception("Only rectangular cross-sections are currently supported for torsional calculations");
}
}
else
{
throw new Exception("Unrecognized shape type");
}
return(new Dictionary <string, object>
{
{ "T_th", phiT_th }
});
}
public ConcreteSectionTorsion GetConcreteTorsionBeam(double Width, double Height, double fc, double d, bool IsLightWeight, double c_cent)
{
IConcreteSection Section = GetRectangularSection(Width, Height, fc, IsLightWeight);
TorsionShapeFactory tss = new TorsionShapeFactory();
IConcreteTorsionalShape shape = tss.GetShape(Section.SliceableShape, Section.Material,
c_cent);
ConcreteSectionTorsion s = new ConcreteSectionTorsion(shape);
return(s);
}
public static Dictionary <string, object> RequiredLongitudinalTorsionRebar(ConcreteFlexureAndAxiaSection ConcreteSection, double T_u, RebarMaterial RebarMaterial,
double c_transv_ctr, double theta = 45, string Code = "ACI318-14")
{
//Default values
double A_l = 0;
//Calculation logic:
TorsionShapeFactory tss = new TorsionShapeFactory();
ConcreteSectionFlexure sec = (ConcreteSectionFlexure)ConcreteSection.FlexuralSection;
IConcreteTorsionalShape shape = tss.GetShape(sec.Section.SliceableShape, ConcreteSection.ConcreteMaterial.Concrete, c_transv_ctr);
ConcreteSectionTorsion secT = new ConcreteSectionTorsion(shape);
double T_u_lb_in = T_u * 1000.0; //internally Kodestruct uses lb - in units for concrete
A_l = secT.GetRequiredTorsionLongitudinalReinforcementArea(T_u_lb_in, RebarMaterial.Material.YieldStress);
return(new Dictionary <string, object>
{
{ "A_l", A_l }
});
}
public static Dictionary <string, object> MaximumTorsionalAndShearStrengthInteraction(ConcreteFlexureAndAxiaSection ConcreteSection, double c_transv_ctr,
double V_u, double T_u, double V_c, double b, double d, bool IsPrestressed = false, string Code = "ACI318-14")
{
//Default values
double InteractionRatio = 0;
//Calculation logic:
TorsionShapeFactory tss = new TorsionShapeFactory();
ConcreteSectionFlexure sec = (ConcreteSectionFlexure)ConcreteSection.FlexuralSection;
IConcreteTorsionalShape shape = tss.GetShape(sec.Section.SliceableShape, ConcreteSection.ConcreteMaterial.Concrete, c_transv_ctr);
ConcreteSectionTorsion s = new ConcreteSectionTorsion(shape);
double V_u_lb = V_u * 1000.0; //internally Kodestruct uses lb - in units for concrete
double T_u_lb_in = T_u * 1000.0; //internally Kodestruct uses lb - in units for concrete
InteractionRatio = s.GetMaximumForceInteractionRatio(V_u_lb, T_u_lb_in, V_c, b, d);
return(new Dictionary <string, object>
{
{ "InteractionRatio", InteractionRatio }
});
}
