For cold-formed sections from the cross-section library as well as for general cold-formed (non-perforated) sections from RSECTION, it is possible to determine the effective cross-section, taking into account the local buckling and instability, and to perform a cross-section check according to EN 1993-1-3, 6.1.6. Internal forces from the calculation using Torsional Warping (7 DOF) are taken into account by means of the equivalent stress check

When importing a DXF file, the following options are available for creating the cross-section:

• Create Elements Automatically
• Use DXF template lines as centerlines of elements with a defined thickness

With the automatic creation of elements, the elements and the associated parts are created from the contour of the outline. Only elements that do not exceed a definable maximum thickness are created. If the cross-section geometry is available as a gravity line model, you can consider the lines of the DXF template as the center lines of the elements. A thickness can be defined that is assigned equally to all elements. The functions 'Create elements automatically' and 'Create elements on lines' are also available in the Edit menu under Manipulation.

In RWIND 2 Pro, it is possible to apply a permeability to a surface. With the definition of

• the Darcy coefficient D,
• the inertial coefficient I, and
• the length of the porous medium in the direction of flow L.

it is possible to define a pressure boundary condition between the front and back of a porous zone. This setting allows for the flow through this zone with a two-part result display on both sides of the zone area.

Furthermore, the generation of a simplified model recognizes permeable zones and takes into account the corresponding openings in the model coating. A pure definition of the permeability parameters allows you to avoid complex geometric modeling of the porous element. This feature can be used to simulate permeable scaffolding, dust curtains, mesh structures, and so on.

More Information

The editor for the mesh refinement control provides the following options.

• Graphic visualization of the areas with mesh refinements
• Mesh refinement of zones
• Deactivating the standard 3D solid mesh refinement with transversion into the corresponding manual 3D mesh refinements.

These options help you to formulate a suitable rule for meshing the entire model, even for the models with unusual dimensions. This allows you to efficiently define small model details on large buildings or detailed meshing areas in the coating area of the model.

The member type "surface model" is used to simulate a member as a surface model in the overall model.

This feature gives you the following added value:

• Quick input via member with cross-section
• Simulation of openings in the web
• Simultaneous output of member and surface results
• Design of member results with add-on
• Consideration of the real stress distribution

The area member can be used for the following applications:

• Castellated beam
• Perforated beams
• Beam with rectangular openings
• Vierendeel truss

Plastic hinges according to FEMA 356 can be used to create pushover curves. These are nonlinear hinges with preset yield properties and acceptance criteria for steel members (Chapter 5 of FEMA 356).

Calculation diagrams can be created and organized globally in RFEM and RSTAB. This is done in the Navigator - Data, or using the menu Insert → Calculation Diagrams. Calculation diagrams can be used to record and display a relation between the various calculation results.

After applying the Building Model add-on, the resulting center of rigidity can be displayed in tables and graphics. This can be further used for dynamic analyses.

For load combinations, it is optionally possible to display the difference results to the initial state. For example, in the case of geotechnical analysis, it is possible to output the settlement as a difference to the initial state "soil self-weight."

All RFEM/RSTAB tables, including the results, can be exported individually or all at once directly into an Excel table and as a CSV file. There are several options available:

• With table headers
• Selected objects only
• Filled rows only
• Only filled tables
• Export data as plain text

This way, you can control and clearly manage the exported data. The stored formulas can be exported directly in the table or as a separate table, as in the case of the used parameters.

For cold-formed sections from the cross-section library as well as for general cold-formed (non-perforated) sections from RSECTION, it is possible to determine the effective cross-section, taking into account the local buckling and instability, and to perform a cross-section check according to EN 1993-1-3, 6.1.6. Internal forces from the calculation using Torsional Warping (7 DOF) are taken into account by means of the equivalent stress check

When importing a DXF file, the following options are available for creating the cross-section:

• Create Elements Automatically
• Use DXF template lines as centerlines of elements with a defined thickness

With the automatic creation of elements, the elements and the associated parts are created from the contour of the outline. Only elements that do not exceed a definable maximum thickness are created. If the cross-section geometry is available as a gravity line model, you can consider the lines of the DXF template as the center lines of the elements. A thickness can be defined that is assigned equally to all elements. The functions 'Create elements automatically' and 'Create elements on lines' are also available in the Edit menu under Manipulation.

In RWIND 2 Pro, it is possible to apply a permeability to a surface. With the definition of

• the Darcy coefficient D,
• the inertial coefficient I, and
• the length of the porous medium in the direction of flow L.

it is possible to define a pressure boundary condition between the front and back of a porous zone. This setting allows for the flow through this zone with a two-part result display on both sides of the zone area.

Furthermore, the generation of a simplified model recognizes permeable zones and takes into account the corresponding openings in the model coating. A pure definition of the permeability parameters allows you to avoid complex geometric modeling of the porous element. This feature can be used to simulate permeable scaffolding, dust curtains, mesh structures, and so on.

More Information

The editor for the mesh refinement control provides the following options.

• Graphic visualization of the areas with mesh refinements
• Mesh refinement of zones
• Deactivating the standard 3D solid mesh refinement with transversion into the corresponding manual 3D mesh refinements.

These options help you to formulate a suitable rule for meshing the entire model, even for the models with unusual dimensions. This allows you to efficiently define small model details on large buildings or detailed meshing areas in the coating area of the model.

The member type "surface model" is used to simulate a member as a surface model in the overall model.

This feature gives you the following added value:

• Quick input via member with cross-section
• Simulation of openings in the web
• Simultaneous output of member and surface results
• Design of member results with add-on
• Consideration of the real stress distribution

The area member can be used for the following applications:

• Castellated beam
• Perforated beams
• Beam with rectangular openings
• Vierendeel truss

Plastic hinges according to FEMA 356 can be used to create pushover curves. These are nonlinear hinges with preset yield properties and acceptance criteria for steel members (Chapter 5 of FEMA 356).

Calculation diagrams can be created and organized globally in RFEM and RSTAB. This is done in the Navigator - Data, or using the menu Insert → Calculation Diagrams. Calculation diagrams can be used to record and display a relation between the various calculation results.

After applying the Building Model add-on, the resulting center of rigidity can be displayed in tables and graphics. This can be further used for dynamic analyses.

For load combinations, it is optionally possible to display the difference results to the initial state. For example, in the case of geotechnical analysis, it is possible to output the settlement as a difference to the initial state "soil self-weight."

All RFEM/RSTAB tables, including the results, can be exported individually or all at once directly into an Excel table and as a CSV file. There are several options available:

• With table headers
• Selected objects only
• Filled rows only
• Only filled tables
• Export data as plain text

This way, you can control and clearly manage the exported data. The stored formulas can be exported directly in the table or as a separate table, as in the case of the used parameters.