Create_NMInterDiagram

Purpose

generates the N-Mz interaction diagram of a section

Synopsis

[N,M] = Create_NMInterDiagram (Method,SecType,IntOpt)

Description

CREATE_NMINTERDIAGRAM generates the N-Mz interaction diagram of a section
  [N,M] = CREATE_NMINTERDIAGRAM (METHOD,SECTYPE,INTOPT)
  the function generates the pairs of normalized axial force N/Np and bending moment M/Mp
  for the normal force N - bending moment M interaction diagram of the section SECTYPE;
  this version supports only rectangular sections and wide flange steel profiles, 
  as specified in the character variable SECTYPE (equal to 'Rect' or Wxxxxx);
  the character variable METHOD is either equal to 'exact' for the analytical solution or
  'num' for the numerical determination of the N-M interaction pairs;
  in the latter case the optional argument INTOPT has the following fields:
      .IntTyp = for quadrature scheme (default = 'Midpoint' for midpoint integration rule);
      .nIP    = no of integration points for rectangular section (default = 10)
      .nIP_fl = no of integration points for flange of W-section (default =  2)
      .nIP_wb = no of integration points for    web of W-section (default =  8)

Cross-Reference Information

This function calls:

• AISC_Section extracts section properties from AISC W-,M-,S-,HP- and HSS-section database
• Rectangle2Layer integration points and weights for 1d-integration of a rectangle