public static Dictionary <string, object> FlexuralLateralTorsionalBuckling(CustomProfile Shape, double F_y,
double L_b, double C_b = 1.0, string BendingAxis = "XAxis", string FlexuralCompressionLocation = "Top", string FlexuralBracingCase = "NoLateralBracing", double E = 29000, bool IsRolledMember = true, string Code = "AISC360-10")
{
//Default values
double phiM_n = 0;
bool IsApplicableLimitState = false;
//Calculation logic:
MomentAxis Axis;
bool IsValidStringAxis = Enum.TryParse(BendingAxis, true, out Axis);
if (IsValidStringAxis == false)
{
throw new Exception("Axis selection not recognized. Check input string.");
}
FlexuralCompressionFiberPosition FlexuralCompression;
//Calculation logic:
bool IsValidStringCompressionLoc = Enum.TryParse(FlexuralCompressionLocation, true, out FlexuralCompression);
if (IsValidStringCompressionLoc == false)
{
throw new Exception("Flexural compression location selection not recognized. Check input string.");
}
FlexuralAndTorsionalBracingType Bracing;
//Calculation logic:
bool IsValidStringBracing = Enum.TryParse(FlexuralBracingCase, true, out Bracing);
if (IsValidStringBracing == false)
{
throw new Exception("Flexural bracing case selection not recognized. Check input string.");
}
SteelMaterial mat = new SteelMaterial(F_y, E);
FlexuralMemberFactory factory = new FlexuralMemberFactory();
ISteelBeamFlexure beam = factory.GetBeam(Shape.Section, mat, null, Axis, FlexuralCompression, IsRolledMember);
SteelLimitStateValue LTB = beam.GetFlexuralLateralTorsionalBucklingStrength(C_b, L_b, FlexuralCompression, Bracing);
phiM_n = LTB.Value;
IsApplicableLimitState = LTB.IsApplicable;
return(new Dictionary <string, object>
{
{ "phiM_n", phiM_n }
, { "IsApplicableLimitState", IsApplicableLimitState }
});
}
public void DoublySymmetricIReturnsFlexuralLateralTorsionalBucklingStrengthInelasticW12()
{
FlexuralMemberFactory factory = new FlexuralMemberFactory();
AiscShapeFactory AiscShapeFactory = new AiscShapeFactory();
ISection section = AiscShapeFactory.GetShape("W12X26", ShapeTypeSteel.IShapeRolled);
SteelMaterial mat = new SteelMaterial(50.0, 29000);
ISteelBeamFlexure beam12 = factory.GetBeam(section, mat, null, MomentAxis.XAxis, FlexuralCompressionFiberPosition.Top);
SteelLimitStateValue LTB =
beam12.GetFlexuralLateralTorsionalBucklingStrength(1.0, 19 * 12, FlexuralCompressionFiberPosition.Top, Steel.AISC.FlexuralAndTorsionalBracingType.NoLateralBracing);
double phiM_n = LTB.Value;
double refValue = 60 * 12; // from AISC Steel Manual Table 3-10
double actualTolerance = EvaluateActualTolerance(phiM_n, refValue);
Assert.True(actualTolerance <= tolerance);
}
public void DoublySymmetricIReturnsLateralTorsionalStrength()
{
FlexuralMemberFactory factory = new FlexuralMemberFactory();
AiscShapeFactory AiscShapeFactory = new AiscShapeFactory();
ISection r = new SectionI("", 12.2, 6.49, 0.38, 0.23);
SteelMaterial mat = new SteelMaterial(50.0, 29000);
ISteelBeamFlexure beam12 = factory.GetBeam(r, mat, null, MomentAxis.XAxis, FlexuralCompressionFiberPosition.Top);
SteelLimitStateValue LTB =
beam12.GetFlexuralLateralTorsionalBucklingStrength(1.0, 19 * 12, FlexuralCompressionFiberPosition.Top, Steel.AISC.FlexuralAndTorsionalBracingType.NoLateralBracing);
double phiM_n = LTB.Value;
double refValue = 60 * 12; // from AISC Steel Manual Table 3-10
double actualTolerance = EvaluateActualTolerance(phiM_n, refValue);
Assert.LessOrEqual(actualTolerance, tolerance);
}