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Frequently Asked Questions (FAQ)
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After the calculation, you can switch to the result window "2.4 Required Reinforcement by x‑Location" in the RF‑CONCRETE Members (RFEM) or CONCRETE (RSTAB) add-on module.
Here, you can select a certain result row for a particular design and x-location (upper table in Window 2.4). Then, you can evaluate the intermediate results in the lower table in Window 2.4. This covers the "Neutral Axis Depth x", for example. The location of the neutral axis for the selected design location is displayed in the graphic on the right of Window 2.4 .
Furthermore, you can display the distribution of the neutral axis depth along the member length graphically in the model or in "Result Diagrams on Member."
You can find the setting in Window 1.5 Support.
Here, you can enter the support width and type, and specify whether to carry out the moment redistribution, or the reduction of moments or shear forces.
Depending on the standard selected in Window 1.1, there are different options available. The option applies to RF‑CONCRETE Members (RFEM 5) and CONCRETE (RSTAB 8).
If the calculation of the longitudinal reinforcement according to the standard is activated, the required reinforcement content is taken into account when displaying the required reinforcement.See the following graphic with the distribution of the required reinforcement without the minimum longitudinal reinforcement according to the standard:Figure 01 - Distribution of Required Reinforcement Without Minimum Longitudinal Reinforcement According to StandardAnd in comparison, the distribution of As,erf,-z(top) with the minimum longitudinal reinforcement according to the standard:Figure 02 - Distribution of Required Reinforcement Incl. Minimum Longitudinal Reinforcement According to StandardIn the result window '2.4 Required Reinforcement by x-Location', you can see which reinforcement is required at each x-location of the designed member. If the minimum longitudinal reinforcement according to the standard becomes relevant, this is indicated by the message No. 26) or 27).At locations where the minimum longitudinal reinforcement is not critical, only the statically required longitudinal reinforcement is displayed. Messages No. 26) and 27) are missing in this case.
Please select only members with a reinforced concrete cross-section in the input dialog box 1.6 for the design. If selecting members made of steel (e.g.), you will get the corresponding error message.Figure 01 - Message No. 2379 - Invalid Material DataIn case you select 'All Members', the members with a steel reinforcement area are automatically removed from the design.
AnswerYou will find an option in the "Settings" of the add-on module (see picture 01).
In RF-/CONCRETE Columns, the column is designed as a 'Structural Component'.When displaying the results 'Bending', 'Shear Force' and 'Bending - Fire Resistance', the maximum value of the design criterion is output as a single value at the governing location (x-location) of the respective design. For example, at the column base, column head, or in the center of the column.If the result display 'Highest Design Criterion' is selected, the maximum value of all design criteria is displayed across the entire 'Structural Component' (column).
AnswerIn RFEM, it is possible to design surfaces and members made of reinforced concrete.Members are designed in the add-on module RF-CONCRETE Members or RF-CONCRETE Columns.Surfaces are designed in the RF-CONCRETE Surfaces add-on module (optionally with RF-CONCRETE Deflect or RF-CONCRETE NL).Reinforced concrete solids cannot be designed in RFEM. There is currently no add-on module for designing the reinforced concrete of solids.However, it is possible to create solids by means of the material 'Concrete' and determine e.g. the stresses within the solid. Optionally, you can insert a result beam into the solid, which is used to convert the results of the solid to member internal forces.The result beam can subsequently be designed in RF-CONCRETE Members or RF-CONCRETE Columns.
AnswerThe standard, which is used for the desing of a structural component, is specified in Window 1.1 of the add‑on module. You can display and hide the old standards by using the "Show Only Valid Standards / National Annexes" button. These standards are marked in red.
AnswerYes, it is.Open the table "1.2 Materials" and the material library for the reinforcing steel. See figure 01.In this material library you can create a new "user-defined" material and edit the standard presets for example for the yield strength. See figure 02.Afterwards you can select this user-defined material for design in table 1.2 in RF-CONCRETE Members and RF-CONCRETE Columns.It is the same for the RSTAB-modules CONCRETE and CONCRETE Columns.In the settings for the national annex, there are limits defined for the maximum value of the yield strength. See figure 03. To change this limit, you need to create a new user defined national annex. See figure 04.
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Wind Simulation & Wind Load Generation
With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
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