Depending on the selected standard, the Calculation Settings dialog box allows the definition of the concrete calculation settings.
Main menu: select Settings > Reinforced Concrete Design > Design Settings.
Ribbon > Analysis tab > RC Design panel > Settings.
This tab defines the reinforced concrete calculation settings.
Calculation Settings - ACI / CAN / CSA standard
Planar elements calculation method
Defines the reinforcement calculation method for the planar elements:
Auto: automatic definition of the calculation method (Wood or Capra).
Note
If the membrane forces are null or irrelevant, the Wood method is used. This calculation procedure allows the evaluation of bending moments starting from Mx, My and Mxy to determine the sections of each reinforcement level. If the membrane forces are significant, the Capra method is used because it takes into account the tension and compression membrane forces. The Capra method is also used in case of combined tension, because the Wood method extension considering the membrane forces leads to exceeded reinforcement when the shell is subjected to compression.
Wood: when the normal forces acting on planar elements are inferior to 10 N.
Capra: when the normal forces acting on planar elements are superior to 10 N.
Baumann: is the default calculation method for Eurocode 2 - Germany. The objective of the method is to reduce a bending or composed bending problem in the pure normal forces problem by dividing the plate thickness in N layers with the same thickness and calculating the normal force in each layer. The method starts with the internal forces in the main directions: N1 and N2 for the normal forces, M1 and M2 for the bending moments. Then, it makes the projection of the local axes of the reinforcement calculation. From these projected internal forces, the Sxx, Syy and Sxy stresses are obtained. Considering a linear gradient, the stresses at each layer border are calculated, and then the corresponding axial forces and the lever arm “z” to the mid plane are calculated. After that, for each layer, the steel tension forces (Nu and Nv) and the concrete compression force (Nw) are calculated.
Number of samples for Capra: The number of divisions for the θ angle used for Capra method.
Forces taken into account for planar elements
Defines the type of forces which are considered (smoothed or not smoothed) at the reinforcement calculation.
Calculation of reinforcement bars: Defines the coordinate system in which the forces are expressed.
Calculation method
Columns calculation method
Columns calculation with specific methods: Enables / disables the calculation of columns reinforcements during the reinforced concrete design.
Specific
Automatic calculation: Specifies if the columns calculation method is automatically determined by the program.
Calculation method
Allows the selection of the calculation method (when the Automatic calculation is disabled):
Axially loaded short columns
Moment magnifier design method
Longitudinal reinforcement bars
Reinforcement: Defines the incremental area used for the iterative method.
Increase of: Defines the reinforcement bars increase percent when the simplified method is used and the external forces include an oblique bending.
Buckling
This tab defines the type of structure for the buckling lengths calculation by Ka Kb coefficients. For xy and xz planes it can be specified if the structure has braced or unbraced nodes. If these options are disabled, there is no specification for the structure's stability and the buckling lengths are calculated by the local parameters of each element.
Columns calculation - Buckling
Note
The settings made in this tab do not affect the elements whose properties are defined by design templates. In this case, the element design properties are linked to the corresponding template.
This tab contains the list of reinforcements from which the concrete expert may suggest at the end of the concrete calculation. Only the selected reinforcements are considered in the concrete design calculation.
Reinforcement settings
Use the selection boxes from the Longitudinal / Transversal columns to specify the reinforcements to consider.
You can also use the All / None options to select or unselect all the available options.
Select the desired system: Metric / Imperial.
This tab defines the verifications to perform during the reinforced concrete calculation.
Calculation sequence
Verify: Verifies the concrete elements errors (modeling errors).
Calculate: Enables the calculation of concrete elements.
Note
For CAN/CSA standard you can also enable Punching verification for the punching verification of slabs.