Area: The cross-sectional area of the section.The principal axis orientation is also indicated on the cross-section diagram. Note that the minor principal axis (the "2" axis) is exactly perpendicular to this. This defines its angle, relative to the X-axis. Angle of Major Principal Axis: The major principal axis (the "1" axis) may be inclined for non-symmetric sections, or it may be at 90 degrees if the section has more lateral than vertical stiffness. The various outputs calculated in each of these analysis types are described below: Elastic Analysis Note that an elastic analysis is always performed in every option. The default, and fastest, option is "Elastic Only", while the other options add warping and/or plastic analyses as well. Calculation Summary Outputs and Analysis Typesįour different Analysis Type options are available: "Elastic Only", "Elastic + Warping", "Elastic + Plastic", and "Everything". The diagram in this section will show the cross-section as it has been input, as well as some of the key properties of that cross-section - including centroid, principal axis orientation, and, if the relevant analysis types have been performed, plastic centroid and shear centre. Restrictions such as these are merely logical restrictions on the geometry overlaps or incomplete fillet radii are not physically possible. For example, an I-section's Depth must be greater must be greater than two times the Flange Thickness plus two times the Inner Radius. Some other cross-section types have specific restrictions. Both dimensions must be greater than zero, but there are no other restrictions. When you do so, the input boxes below it will change to those required for the given type of cross-section.įor example, a rectangle has two dimensions to define it: Depth and Breadth. Input Key Propertiesįirst, select the Cross-Section Type from the drop-down menu just below the diagram. Clicking on any of the input/property labels gives a descriptive reference explanation.
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