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Double click on the Quad-Area Spring tool (
).
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In the Default Area Spring Properties dialog box:
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Set an r-force constant of 0.1 pci [0.00001 N/mm3].
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Set an s-force constant of 0.1 pci [0.00001 N/mm3].
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Set a z-force constant of 250 pci [0.07 N/mm3], and click OK.
Note: You need horizontal springs (r and s) with very small stiffnesses since there are lateral loads.
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Define an area spring over the entire slab by clicking four corners of a quadrilateral. This shape need not match the slab’s exact dimensions, but should cover the entire slab.
You have now defined the structure but the element mesh does not yet exist.
