To obtain a moment curvature curve Moment-curvature curves may be obtained for a giver section, first create the section in the section designer. Once you have created the section in Section Designer, click on "given section and axial load through the following process:
- Create the section using the Section Designer.
- Select Display > Show Moment-Curvature Curve
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- to display the moment-curvature curve for a default axial force of zero (
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Neutral Axis Location
The neutral axis location is measured from the centroid of the cross-section, perpendicular to the line that is defined by the angle as shown in the figure below:
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- Figure 1).
- Enter the desired axial force (P), then select Refresh to generate the curve for a specific axial load.
Figure 1 - Moment-curvature curve
Neutral-axis location
Angle (Deg) specifies the orientation of the neutral axis, measured counterclockwise from the negative 3 axis, as shown in Figure 2. Moment-curvature formulation then determines the location of the neutral axis. Neutral-axis location is measured along an orthogonal projection from the neutral axis to the section centroid.
Figure 2 - Neutral-axis location