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Frequently Asked Questions (FAQ)
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Member stiffnesses can be modified by means of member stiffness modification and structural modification.
In the Data navigator, you can find the member stiffness modifications under "Types for Members." If necessary, you can create a list of various modifications in the corresponding dialog box. Under "Modification type", you can modify partial stiffnesses and weight, see Figure 1.
In the next step, you can also create a structure modification using the Data navigator under "Special Objects". Within this, activate the "Members" option in the "General" tab so that the "Members" tab becomes active, see Figure 2.
Then, select the corresponding member stiffness modification including the respective members in the "Members" tab, see Figure 3. Of course, you can also create a new member stiffness modification directly using the drop-down menu.
In the last step, activate the desired structural modification in the corresponding load case or combination in the "Load Cases and Combinations" dialog box, see Figure 4. Again, a new structural modification can be created directly from here.
Yes, it is. If a weld is defined on a line in the surface model, the stresses of the line weld can be calculated with the "Stress-Strain Analysis" add-on.
The following joint types are available:
- Butt Joint
- Corner Joint
- Lap Joint
- Tee Joint
Based on the selected joint type, you can select the following weld types:
- Single Square
- Double Square
- Double Bevel
- Single V
- Double V
- Single U
- Double U
- Single J
- Double J
Click "Ignore All" after the message appears, and the crash report should open automatically.
As an alternative, you can try to start the crash reporter manually. The executable file can be found in the program directory. For RFEM 6.01, the path is:
C:\Program Files\Dlubal\RFEM 6.01\bin\CrashReporter.exe
This allows you to send us at least your system information. We will then try to find the cause of the problem and fix it as soon as possible.
The "Favorable permanent actions" option can be found within the respective combination wizard under Options II. You can open the combination wizard either in the "Load Cases and Combinations" dialog box → "Design Situations" tab → "Options," or using the Data navigator → "Load Cases and Combinations" → "Combination Wizards", see the image below.
When activating the favorable permanent actions, the load combinations with 1.0 times the self-weight are also created.
The torsional moments are neglected by using the limit values for special cases within the respective design configuration for the ultimate limit state, see the image.
To modify the coordinates of nodes, it is possible to import the coordinates of another node. To do this, you can click one of the four buttons next to the coordinates, to be able to:
- "Select Node or Point in Graphics and Import Its Coordinate X"
- "Select Node or Point in Graphics and Import Its Coordinate Y"
- "Select Node or Point in Graphics and Import Its Coordinate Z"
- "Select Node or Point in Graphics and Import Its Coordinates"
Under the RFEM 6 Concrete Design add-on - Global Settings - Reinforcing Bar - Bar size definition, the default setting "Bar Size Designation" can be changed to "Nominal Diameter". This option will allow the user to set the bar size diameter directly rather than selecting a default bar size from the drop-down.
In the current state of RFEM 6, the user must manually define the shear and longitudinal reinforcement for both members and surfaces. This is considered the "Provided Reinforcement" within the Concrete Design add-on. The add-on calculation will then determine the "Required Reinforcement" needed from the analysis and further output the "Not Covered Reinforcement". The user must manually apply additional reinforcement if the "Required Reinforcement" is not met.
It is planned for the future to have an automatic design of the member and surface reinforcement rather than only the manual input option.
Please make sure that you have deactivated the "Find the most economical reinforcement for crack width design" option for the setting of the method of check in the "Serviceability Limit State" tab of General Data, see Image 01.
As soon as you clear this option, is it possible to define the user-defined additional reinforcement, see Image 02.
There can be many reasons for unstable structural systems. The best way to determine the reason for this message is to use the Structure Stability add-on.
This add-on allows you to calculate your structure without loading, and thus to perform an instability analysis using the mode shape.
Therefore, you can display the unstable shape of your structure.
As you can see in our example, the upper steel beams are subjected to the lateral deflection.
Upon closer inspection of our modeling, we recognize that we have unconsciously created a hinge chain from couplings of the fixed hinge type. If we remove this hinge chain, we can calculate the load case.
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Wind Simulation & Wind Load Generation
With the stand -alone program RWIND Simulation, you can simulate wind flows around simple or complex structures 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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