Australia / Estándar de Nueva Zelanda 4600 para estructuras de acero conformadas en frío, 2018 Edición
AS/NZS 4600:2018 module checks cold-formed steel members with the Método de fuerza directa. It runs in SkyCiv Structural 3D and supports custom restraints along each member.
Para el 2005 edition, ver Diseño de miembro AS4600.
With this module you can:
- Run design checks to AS/NZS 4600:2018 with the Direct Strength Method, incluidos:
- Member pre-qualification
- Axial tension
- Axial compression: section capacity, and member capacity for global, local and distortional buckling
- Bending about both axes: section capacity, and member capacity for lateral-torsional, local and distortional buckling
- Shear along both axes
- Combined bending and shear
- Compresión y flexión combinadas
- Tensión y flexión combinadas
- Design channels, Z sections, hat sections, back-to-back channels and lipped channel boxes, prismatic or non-prismatic
- Define custom restraints and pseudo-restraints along each member
- Export detailed step-by-step PDF reports
- Ejecute el diseñador SkyCiv (Run Designer) to find the most efficient section
Current version support
compuestas
- canales
- Canal con labios
- Lipped Channel single
- Sección Z
- Z con labios
- Sección de sombrero
- Back-to-back Channels
- Back-to-back Lipped Channels
- Caja de canal Lipped
Back-to-back lipped channels and lipped channel boxes are supported only by this code. Sections can be prismatic or non-prismatic, and the material must be steel. Sections must not come from the Australian/Steel (250 Calificación), Australian/Steel (300 Calificación), Australian/Steel (Estimado) or American/AISI databases.
To see this list in the software, open the log and click View supported sections.
Software
- SkyCiv Structural 3D
AS / NZS 4600-2018 is also listed in the Código de diseño dropdown of SkyCiv Beam. This page describes the module in SkyCiv Structural 3D.
Nota
Units must be in Métrico to use this design module. In the Model, abierto Configuraciones (top bar) > Unidades and set the unit system to Métrico.
Opening the module
- Solve the model.
- Haz clic Diseño in the top bar.
- En Select a Design Module, elegir Cold-Formed Steel Member.
- En Which design code would you like to start?, pick AS / NZS 4600-2018, luego haga clic Comienzo.
If a design module is already open, usar Modificar módulo en el Diseño menu to switch codes.
The design panel opens on the left, with the 3D model on the right. The header shows the code, más Request Feature y Run Designer. On the right of the tab bar are three buttons:
- the settings (engranaje) ,, which opens Member Design Settings
- the log button, which opens the Member Design Log
- Cheque, which runs the design check
When the module starts, an alert may tell you that there are important messages. They are shown in the Member Design Log, for example "6 members were loaded with default values", or members that were not imported because their section or material isn’t supported. The log has a View supported sections enlace.
The tabs are Detalles, Factores, Materiales, compuestas, barras , Restricciones, Cargas y Resultados.
Member Design Settings
Click the gear button to open Member Design Settings. It has one option:
- Checks based on geometric axes instead of principal axes: unchecked by default. It affects the capacity of sections that are not symmetric about both axes, such as Z sections.
As the dialog notes, engineering guidance should be used when you change these settings. Haz clic Guarda aplicar.
Detalles
Sobre el Detalles tab you can enter the project details. You don’t have to fill them in, but anything you enter is shown in the detalles del proyecto table of your reports. Project Units shows Métrico and can’t be changed here.
Factores
El Factores tab shows the capacity reduction factors:
| Factor | Descripción | Defecto |
|---|---|---|
| FiC | Compresión | 0.85 |
| FiB | Doblar | 0.9 |
| FiV | Corte | 0.9 |
| FiT | Tensión | 0.9 |
If a member is not pre-qualified (Cláusula 1.6.3(c)(i)), FiC, FiB and ΦV are reduced to 0.8. The factors used for each member are listed in its report under Strength Limit State Factors, with their clause references.
Materiales
El Materiales tab lists the materials used by the designed members, with their Fuerza de producción y Fuerza final. The table is filled in from the model and can’t be modified here. To change a material, go back to the Model.
compuestas
El compuestas tab lists the sections used by the designed members. The section data comes from the model and can’t be modified here.
- Diseño: tick the box to design the members that use this section. The icon in the column header toggles all rows.
- ID de sección, Sección de, Forma, ID de material y Material: taken from the model.
- DSM: hacer clic Ver to see the DSM factors of the section.
El DSM Factors for Section n dialog shows a sketch of the section with its axes, and the elastic buckling stresses (in MPa) used by the Direct Strength Method:
| Símbolo | Buckling stress |
|---|---|
| Flos,l,c | pandeo local, compresión |
| Flos,d,c | Pandeo distorsional, compresión |
| Flos,l,bx | pandeo local, bending about x |
| Flos,d,bx | Pandeo distorsional, bending about x |
| Flos,l,por,- y flos,l,por,+ | pandeo local, bending about y (negativo y positivo) |
| Flos,d,por,- y flos,d,por,+ | Pandeo distorsional, bending about y (negativo y positivo) |
Any factor that is not provided has its check skipped. For a section that is symmetric about an axis, the positive and negative factors about that axis are not needed. The values can’t be edited here: to change them, Ve a la Constructor de Sección and launch the Diseño de acero conformado en frío módulo.
barras
El barras tab lists the design members. Each design member is made up of one or more model members.
- Expand Table Width: widens the table.
- Split Selected y Join Selected: split the selected design members, or join them into one design member.
| Columna | Descripción |
|---|---|
| Seleccione | Ticks the row, for example to split or join members |
| Diseño | Tick to include the member in the design check, untick to leave it out |
| Design Member ID | The ID of the design member |
| Como el soporte más cercano puede ser una viga O viga | The model member(s) that make up the design member |
| IDS de sección | La sección(s) of the design member |
| L (m) | The length of the design member |
| Restraint ID | The restraint set used by the member. Click it to open that restraint in the Restricciones lengüeta |
Design Member ID, Como el soporte más cercano puede ser una viga O viga, IDS de sección y L (m) come from the model and can’t be changed here. Effective lengths and K factors are not entered on this tab: they come from the Restricciones lengüeta.
Restricciones
AS / NZS 4600:2018 supports custom restraints, so you can add your own restraints to be used in the calculations. For a full description, see our documentation on restricciones de miembro.
- Grupo automático: gives similar members the same restraint ID.
- Restraint ID: selects the restraint ID to view or edit. Use the down and up arrows to go to the next or previous ID.
- Assign to Member(s): assigns the current restraint ID to members.
- Duplicar: copies the current restraint ID to a new ID.
The restraint table is filled in from the model supports and connections. Por ejemplo, a member supported at both ends gets a row at each end.
| Columna | Descripción |
|---|---|
| Seleccione | Ticks the row, for example to apply a standard restraint to it |
| Posición | Distance of the restraint from the start of the member |
| Major Compression | 2-key restraint code (F or R) for major-axis flexural buckling |
| Kz | Effective length factor for the major axis (auto por defecto) |
| Minor Compression | 2-key restraint code (F or R) for minor-axis flexural buckling |
| Kentucky | Effective length factor for the minor axis (auto por defecto) |
| Tesional lateral | 4-key restraint code (F, R or S) para pandeo lateral por torsión |
| Global Buckling Bracing | Unbraced, Parte superior, Fondo o Ambas cosas. If the lateral-torsional restraint fully braces a flange, the global buckling check is skipped for the cases that the bracing covers. Hover over the ℹ icon for details |
| Eliminar | Deletes the restraint row |
Para agregar pseudo-restricciones (restraints that are not modelled), enter the spacings in Agregar pseudo-restricciones por espaciado(s) y haga clic en Añade. You can enter a comma separated list (por ejemplo 1.5,1.5,1.5), use the multiply operator (4*1.5), or use the < operator to fit as many restraints as possible. Haz clic Eliminar next to Añade to remove all the pseudo-restraints.
Pseudo-restraints are added as released (RR y RRRR), so they have no effect until you change their codes. En el siguiente ejemplo, 4*1.5 adds rows at 1.5, 3 y 4.5 m on a 6 m member, and their Lateral-Torsional code is changed to FFFR.
Below the table are sub-tabs, each with an A (automatic) badge by default:
- Tensión: con Default values a, the defaults are used. Switch it off to enter your own:
- kt: correction factor for the distribution of forces in a tension member. The default assumes a non-uniform force distribution, per AS/NZS 4600:2018 Cláusula 3.2.3.2.
- Anorte factor: factor that reduces the gross area to the net area. El valor predeterminado es 0.85, which assumes a bolted connection.
- Major Compression (Lz, Kz), Minor Compression (Ly, Ky), Twist Compression (Lx, Kx), Major Lateral-torsional (Lb, kLT, Cb) y Minor Lateral-torsional (Lb, kLT): por defecto, Determine from restraints (as defined in the restraints table) esta encendido. Switch it off to enter your own values for the whole member. Debajo Standard Restraints, click an icon to apply a standard restraint to the selected rows.
El Restricciones section of each member report shows the restraints that were used: the user input (posición, códigos de restricción, kno ykoye, top and bottom flange restraint, member rotation and global buckling bracing), the major-axis and minor-axis compression segments, the compression twist segments, the effective lateral-torsional restraints and the segments for each load combination.
Cargas
El Cargas tab lists the load combinations from the model, with their Nombre y Criterios. Tick Aplicar for each load combination you want to include. Serviceability combinations are listed and can be ticked, but no serviceability check is performed.
Resultados
Haz clic Cheque to run the design check. El Resultados tab shows:
- Mostrar ratios de diseño para: chooses which ratios are shown, por ejemplo Governing Result, Miembros fallidos, or a single check.
- GOVERNING: the highest ratio and its member.
- A toolbar to filter (Todos), sort, Copiar, show the table and open the report, más tiene Resumen button for the summary report.
- El Proporciones de diseño de miembros mesa, con un Estado (Pasar o Fallar) y un Reporte icon for each member. Hover over the ℹ icon in a column header to see the clause it refers to.
| Columna | Cheque | Cláusula |
|---|---|---|
| PAG | Axial (tensión o compresión) | 3.2 o 7.2.1 |
| Mx | Bending about x | 7.2.2 |
| My | Bending about y | 7.2.2 |
| V y | Shear along y | 7.2.3 |
| V x | Shear along x | 7.2.3 |
| CSBx | Combined shear and bending, about x | 7.2.3 |
| CSBy | Combined shear and bending, about y | 7.2.3 |
| CCB | Compresión y flexión combinadas | 7.2.4 |
| CTBm | Tensión y flexión combinadas, member capacity | 7.2.5(1) |
| CTBs | Tensión y flexión combinadas, section capacity | 7.2.5(2) |
In the 3D view, each member is coloured Fallar, Advertencia o Pasar and labelled with its governing ratio.
Comprobaciones realizadas
| Cheque | AS / NZS 4600:2018 referencia |
|---|---|
| Member pre-qualification (sets Φ) | Cláusula 1.6.3 |
| Axial tension, section capacity | Sección de 3.2 |
| Axial compression, section capacity | Sección de 7.2.1.3 |
| Axial compression, member capacity (global, local and distortional buckling) | Sección de 7.2.1 |
| Bending about x and y, section capacity | Sección de 7.2.2.3.2 |
| Bending about x and y, member capacity (lateral-torsional, local and distortional buckling), including positive and negative bending about y for singly symmetric sections | Sección de 7.2.2.1 |
| Shear along y (web) and along x (brida) | Sección de 7.2.3 |
| Combined bending and shear, about both axes | Eq. 7.2.3(9) |
| Combined axial compression and bending | Eq. 7.2.4 |
| Combined axial tension and section bending capacity | Eq. 7.2.5(2) |
| Combined axial tension and member bending capacity | Eq. 7.2.5(1) |
The module does not check slenderness limits, deflexión (utilidad), web crippling or torsion.
PESO
Click the report icon in a member’s Reporte column to open its design report. It opens in a Design Report for Member #n dialog with Close, Abrir en nueva pestaña, Descargar HTML y Descargar PDF botones. The report is titled "AS/NZS 4600-2018 – Direct Strength Method", and contains:
- detalles del proyecto
- Utilidad: every check with its reference, símbolo, description, proporción y estado
- compuestas: the dimensions and properties of the section
- Estados límite últimos: Precalificación de miembros, Strength Limit State Factors, Member Internal Actions, Member and Restraints, followed by each check step by step
Haz clic Resumen on the Results tab to open the Informe resumido. It lists the project details (including the design code), the strength load combinations with their factors, and the results for all members.
