AdjustmentFactors GetAdjustmentFactors(double F_c, double E_min, LoadCombinationType LoadCombinationType)
{
double C_M_Fc = MoistureCondition == MoistureCondition.Wet ? Member.GetWetServiceFactor(ReferenceDesignValueType.CompresionParallelToGrain) : 1.0;
double C_M_E = MoistureCondition == MoistureCondition.Wet ? Member.GetWetServiceFactor(ReferenceDesignValueType.ModulusOfElasticity) : 1.0;
double C_M_Emin = MoistureCondition == MoistureCondition.Wet ? Member.GetWetServiceFactor(ReferenceDesignValueType.ModulusOfElasticityMin) : 1.0;
double C_t_Fc = Member.GetTemperatureFactorCt(ReferenceDesignValueType.CompresionParallelToGrain, Temperature, MoistureCondition);
double C_t_E = Member.GetTemperatureFactorCt(ReferenceDesignValueType.ModulusOfElasticity, Temperature, MoistureCondition);
double C_t_Emin = Member.GetTemperatureFactorCt(ReferenceDesignValueType.ModulusOfElasticityMin, Temperature, MoistureCondition);
double lambda = Member.GetTimeEffectFactor(LoadCombinationType, false, IsPressureTreated);
double phi = Member.GetStrengthReductionFactor_phi(ReferenceDesignValueType.Bending); //Table N.3.2
double K_F = Member.GetFormatConversionFactor_K_F(ReferenceDesignValueType.Bending);
double F_c_Star = Member.Get_FcStar(F_c, C_M_Fc, C_t_Fc, lambda);
double E_min_prime = Member.GetAdjustedMinimumModulusOfElasticityForStability(E_min, C_M_E, C_t_E);
double C_P_strong = Member.GetColumnStabilityFactor_C_P(F_c_Star, E_min_prime, l_e, d);
double C_P_weak = Member.GetColumnStabilityFactor_C_P(F_c_Star, E_min_prime, l_e, b);
return(new AdjustmentFactors()
{
C_M_Fc = C_M_Fc,
C_M_E = C_M_E,
C_M_Emin = C_M_Emin,
C_t_Fc = C_t_Fc,
C_t_E = C_t_E,
C_t_Emin = C_t_Emin,
C_P = Math.Min(C_P_strong, C_P_weak),
lambda = lambda,
phi = phi,
K_F = K_F
});
}
/// <summary>
/// Time effect factor from NDS 2015 section N.3.3 (lambda)
/// </summary>
/// <param name="CombinationType"> Type of combination, Table N3.</param>
/// <param name="IsConnection">If connection, lambda greater than 1.0 will not apply. </param>
/// <param name="IsConnection">If pressure-treated with water-borne preservativesor fire retardant chemicals, lambda greater than 1.0 will not apply. </param>
/// <returns></returns>
///
public double GetTimeEffectFactor(LoadCombinationType CombinationType,
bool IsConnection, bool IsTreated = false)
{
switch (CombinationType)
{
case LoadCombinationType.DeadLoadOnly:
return(0.6);
break;
case LoadCombinationType.FullLiveLoadStorage:
return(0.7);
break;
case LoadCombinationType.FullLiveLoad:
return(0.8);
break;
case LoadCombinationType.FullLiveLoadImpact:
if (!IsConnection && !IsTreated)
{
return(1.25);
}
else
{
return(1.0);
}
break;
case LoadCombinationType.FullLiveLoadWithWind:
return(0.8);
break;
case LoadCombinationType.FullWind:
return(1.0);
break;
case LoadCombinationType.FullEarthquake:
return(1.0);
break;
default:
return(1.0);
break;
}
}
public double GetFlexuralStrengthMajorAxis(LoadCombinationType LoadCombinationType)
{
double F_bx_plus = Member.Material.F_bx_p;
var f = GetAdjustmentFactors(F_bx_plus, LoadCombinationType, true);
//The beam stability factor, CL, shall not apply simultaneously with the volume factor, CV, for structural glued laminated timber bending
//members.Therefore, the lesser of these adjustment factors shall apply.
double F_b_prime = F_bx_plus * f.C_M_Fb * f.C_t_Fb * Math.Min(f.C_L, f.C_v) * f.C_fu * f.C_c * f.C_I * f.K_F * f.phi * f.lambda;
double S_x = this.Member.Section.S_xBot;
return(F_b_prime * S_x);
}
public double GetCompressionStrength(LoadCombinationType LoadCombinationType)
{
double F_c = NumberLaminations < 4 ? Member.Material.Fc_23 : Member.Material.F_c4;
double E_min = Member.Material.E_min;
var f = GetAdjustmentFactors(F_c, E_min, LoadCombinationType);
//The beam stability factor, CL, shall not apply simultaneously with the volume factor, CV, for structural glued laminated timber bending
//members.Therefore, the lesser of these adjustment factors shall apply.
double F_c_prime = F_c * f.C_M_Fc * f.C_t_Fc * f.C_P * f.K_F * f.phi * f.lambda;
double A = this.Member.Section.A;
return(F_c_prime * A);
}
AdjustmentFactors GetAdjustmentFactors(double F_b, LoadCombinationType CombinationType, bool IsStrongAxis)
{
double C_M_Fb = MoistureCondition == MoistureCondition.Wet? Member.GetWetServiceFactor(ReferenceDesignValueType.Bending) :1.0;
double C_M_E = MoistureCondition == MoistureCondition.Wet ? Member.GetWetServiceFactor(ReferenceDesignValueType.ModulusOfElasticity):1.0;
double C_M_Emin = MoistureCondition == MoistureCondition.Wet ? Member.GetWetServiceFactor(ReferenceDesignValueType.ModulusOfElasticityMin):1.0;
double C_t_Fb = Member.GetTemperatureFactorCt(ReferenceDesignValueType.Bending, Temperature, MoistureCondition);
double C_t_E = Member.GetTemperatureFactorCt(ReferenceDesignValueType.ModulusOfElasticity, Temperature, MoistureCondition);
double C_t_Emin = Member.GetTemperatureFactorCt(ReferenceDesignValueType.ModulusOfElasticityMin, Temperature, MoistureCondition);
double C_c = Member.GetCurvatureFactor_C_c();
double C_I = Member.GetCurvatureFactor_C_I();
double lambda = Member.GetTimeEffectFactor(CombinationType, false, IsPressureTreated);
double phi = Member.GetStrengthReductionFactor_phi(ReferenceDesignValueType.Bending); //Table N.3.2
double K_F = Member.GetFormatConversionFactor_K_F(ReferenceDesignValueType.Bending);
bool IsSouthernPine = (WoodSpecies == GlulamWoodSpeciesSimple.DouglasFir || WoodSpecies == GlulamWoodSpeciesSimple.Other) ? false : true;
double C_L = Member.GetStabilityFactorC_L(b, d, F_b, L, l_e, Member.Material.E_x_min, C_M_Fb, C_M_E, C_t_Fb, C_t_E, C_c, C_I, lambda, IsSouthernPine);
double C_v = Member.GetVolumeFactor_C_v(d, L, IsSouthernPine);
double C_fu = IsStrongAxis? 1.0: Member.GetFlatUseFactor();
return(new AdjustmentFactors()
{
C_M_Fb = C_M_Fb,
C_M_E = C_M_E,
C_M_Emin = C_M_Emin,
C_t_Fb = C_t_Fb,
C_t_E = C_t_E,
C_t_Emin = C_t_Emin,
C_c = C_c,
C_I = C_I,
C_L = C_L,
C_v = C_v,
C_fu = C_fu,
lambda = lambda,
phi = phi,
K_F = K_F
});
}
/// <summary>
/// Time effect factor from NDS 2015 section N.3.3 (lambda)
/// </summary>
/// <param name="CombinationType"> Type of combination, Table N3.</param>
/// <param name="IsConnection">If connection, lambda greater than 1.0 will not apply. </param>
/// <param name="IsConnection">If pressure-treated with water-borne preservativesor fire retardant chemicals, lambda greater than 1.0 will not apply. </param>
/// <returns></returns>
///
public double GetTimeEffectFactor(LoadCombinationType CombinationType,
bool IsConnection, bool IsTreated=false)
{
switch (CombinationType)
{
case LoadCombinationType.DeadLoadOnly:
return 0.6;
break;
case LoadCombinationType.FullLiveLoadStorage:
return 0.7;
break;
case LoadCombinationType.FullLiveLoad:
return 0.8;
break;
case LoadCombinationType.FullLiveLoadImpact:
if (!IsConnection && !IsTreated)
{
return 1.25;
}
else
{
return 1.0;
}
break;
case LoadCombinationType.FullLiveLoadWithWind:
return 0.8;
break;
case LoadCombinationType.FullWind:
return 1.0;
break;
case LoadCombinationType.FullEarthquake:
return 1.0;
break;
default:
return 1.0;
break;
}
}
