public double GetRequiredTorsionTransverseReinforcementArea(double T_u, double s, double f_yt,
double theta = 45.0)
{
double A_o = 0.85 * Shape.GetA_oh();
double thetaRad = theta.ToRadians();
StrengthReductionFactorFactory srf = new StrengthReductionFactorFactory();
double phi = srf.Get_phi_Torsion();
//(22.7.6.1a)
double A_tReq = ((T_u * s) / (phi * 2.0 * A_o * f_yt)) * 1.0 / (Math.Tan(thetaRad));
return(A_tReq);
}
public double GetRequiredTorsionLongitudinalReinforcementArea(double T_u, double f_y,
double theta = 45.0)
{
double A_o = 0.85 * Shape.GetA_oh();
double p_h = Shape.Get_p_h();
double thetaRad = theta.ToRadians();
StrengthReductionFactorFactory srf = new StrengthReductionFactorFactory();
double phi = srf.Get_phi_Torsion();
//(22.7.6.1b)
double A_lReq = ((T_u * p_h) / (phi * 2 * A_o * f_y)) * 1.0 / (Math.Tan(thetaRad));
return(A_lReq);
}
public double GetMaximumForceInteractionRatio(double V_u, double T_u, double phiV_c, double b, double d)
{
StrengthReductionFactorFactory srf = new StrengthReductionFactorFactory();
double phi = srf.Get_phi_Torsion();
double phi_shear = srf.Get_phi_ShearReinforced();
double V_c = phiV_c / phi_shear;
//(22.7.7.1a)
double Sqrt_f_c = Shape.Material.Sqrt_f_c_prime;
double p_h = Shape.Get_p_h();
double A_oh = Shape.GetA_oh();
double IR1 = Math.Sqrt(Math.Pow((((V_u) / (b * d))), 2) + Math.Pow((((T_u * p_h)) / (1.7 * Math.Pow(A_oh, 2))), 2));
double IR2 = phi * ((V_c) / (b * d) + 8 * Sqrt_f_c);
double IR = IR1 / IR2;
return(IR);
}
