Interaction Diagrams of Hollow RC Columns

Interaction diagrams of hollow RC columns with circular or rectangular tubes

Two example are attached for interaction diagrams of RC columns with rectangular and circular tubes using the function Interaction_Diagrams.

function Interaction_Diagrams(x,y,x_s,y_s,a_s,fc,fy,E)

Input:

x: x coordiantes of section vertix vector (mm)
y: y coordinates of section vertix vector (mm)
a_s: area of steel bars vector (mm^2)
x_s: x coordinates of steel bars vector (mm)
y_s: y coordinates of steel bars vector (mm)
fc: compressive strength of concrete (MPa)
fy: yield stress of steel vector (MPa)
E: modulus of elasticity of steel vector (MPa)

Output:

Column section, failure envelope, interaction diagrams in x and y directions are plotted in one figure.