Use the Additional parameters dialog to define specific parameters of RC column calculations depending on a selected RC code. The parameters that are displayed will vary depending on the code selected for calculations of the required reinforcement areas.
The Additional parameters dialog is available for the following codes:
American codes ACI, Canadian code CSA A23.3-94
Parameters used in the calculation of slender columns.
- Moment magnification:
- Automatic calculations - a member type assigned to the story; the option is not available in the current program version
- Magnifiers; this option allows direct definition of a buckling coefficient for a sway structure
- Design forces to critical forces ratio; a value of the coefficient is used for calculation of a buckling coefficient according to the formula (10-18) ACI 318-02
- Stability index of a story; a value of the index is used for calculation of a buckling coefficient according to the formula (10-17) ACI 318-02
- Analysis of moments:
- Constant ratio of moments; a ratio of first-order moments (non-sway moments) to total moments (resulting from combinations) should be defined; this ratio is the basis for calculation of the moments M1ns, M1s and M2ns, M2s
- Ms due to loads; this option allows indicating moments that result from the second order analysis (sway moments); this option is not available in the current program version.
French codes BAEL
Methods for calculations of RC columns:
- Simple compression; columns are calculated as ones subjected to simple compression according to point B.8.4,1 of the BAEL 91 code
- With bending; this option is not available in the current program version.
Eurocode 2
Methods for calculations of RC columns:
- Calculation of biaxially bent rectangular columns
- Simplified second order analysis.
Chinese code GB 50010-2002
Methods for the calculations of RC columns:
- Axial force N (7.3.1)
- One-way eccentric compression N, My
- Two-way eccentric compression N, My, Mz (Appendix F)
- Two-way eccentric compression N, My, Mz (7.3.14 - 2).