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Header | Description |
|---|---|
2nd order effects | The user can select from P-Delta, Moment Magnification, Slender Wall, or None. See the Engineering Theory for a discussion of these analysis procedures. |
Analysis beta d | When P-Delta has been selected, the user can then select the type of Beta d value used, non-sway or sway (see ACI 318 for a discussion of these two factors). The user can also select to input their own Beta d factor used in the analysis. |
Cracking Method | There are two typical options available for the cracking method they are the Mast Method and the ACI Table 6.6.3.1.1(b) method. If the 2nd order effect is selected to be “Slender Wall” then ACI 11.8.3.1(c) is exclusively used. |
Area of Steel | If “Slender Wall” is the selected 2nd order effect the area of steel can be changed. Actual uses only the provided area of steel for Icr (ACI 11.8.3.1c). Effective uses the provided area of steel plus the additional term. |
Crackling Limit | Multiplier used to compute the modulus of rupture for the structural analysis. Settings this value to 0 will force the program to assume the member is cracked at all locations in the structural analysis. This input is separated from the Class U / Modulus of Rupture inputs because those values are used for design calculations where this input is used for analysis calculations. |
Allow cracks to close | When performing the cracking analysis, cracks are iterated until the moment of inertia for all sections does not change. This means cracks are recomputed for each cross section every iteration. If unchecked, once a section is cracked it’s section properties can only decrease due to further cracking, they can never close and increase section properties. |
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