Use this dialog to define specific parameters of RC column depending on the RC code selected.
Access
- Click Design
Required Reinforcement of Beams/Columns - Options Code parameters to open the R/C Member Type dialog, and then click 
. In the Member Type definition dialog, go to the Column tab, and then click Additional parameters. - Click
(R/C Member Type) to open the R/C Member Type dialog, and then click . In the Member Type definition dialog, go to the Column tab, and then click Additional parameters.
Dialog elements
Note: 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
- 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
- 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).