Steel Design EC 3 - Calculation Settings

 

When Eurocode 3 standard is the steel standard selected for the current project, the Calculation Settings dialog box allows the definition of the steel calculation settings.

 

How to access the command

 

Calculation settings

Eurocode 3 Calculation Settings - Verification

Verification settings

This tab allows the selection of the shapes calculation type and enables / disables the steel verifications.

 

Imperfections and 2nd order effects

 

Imperfection generation

In compliance with Eurocode 3, imperfection generation involves the creation of additional load cases that introduce forces from imperfections. These new cases are derived from the existing load combinations. However, to prevent the generation of imperfections for all existing combinations, Advance Design includes a feature that allows you to select only the combinations where imperfection forces are highest.

 

You have two options:

 

Columns

 

Beams

 

Plate (web) buckling

 

Safety factors settings

Within this tab, you have the ability to set and customize the safety factors for your project. By configuring these settings, you can tailor the safety factors to meet the specific requirements and constraints of your project.

 

Calculation Settings - Safety factors

Calculation Settings - Safety factors

 

With the Partial safety factors tab you can establish custom safety factors for Steel Design.

By default, the system selects Auto, which means that it uses values from national annexes or EC3.

 

Significance of factors:

 

γM0  partial factor for resistance of cross-sections whatever the class is

γM1  partial factor for resistance of members to instability assessed by member checks

γM2  partial factor for resistance of cross-sections in tension to fracture

 

Note: The imposed factors will be applied when generating load combinations. The partial safety factors must be set before generating the combinations. If combinations are already generated, after setting values for partial safety factors, the combinations must be regenerated. 

 

Optimisation settings

This tab defines the shapes optimization settings.

Optimisation settings

Calculation Settings - Optimisation

Optimisation mode

Allows the selection of the optimization method. The shapes optimization is created function of the selected criterion:

Find new sections

Defines the work ratio limits taken into account for the cross sections optimization. The steel elements work ratio can be defined by one limit or by both (superior and inferior limit):

Search range

Define the search range for new section (automatic or automatic with a maximum limit).

Apply new section to the whole super element: if enabled, during the steel section optimization, when the user accepts a new section for an element that is part of super element, the other elements are updated as well.

 

Sort profiles options

This tab defines the sorting criteria used for determining the most stressed cross sections.

Sort profiles options

Calculation Settings - Sort profiles

Sort Mode

Note

To enable the Chained optimization, select the corresponding option in the Calculation Sequence tab of the Steel Design Calculation Settings dialog box.

 

Search type

Select the search criteria - by heigth, by width, by ly inertia, by lz inertia, by weight (only one option can be selected).

 

Limits for profiles

Select the maximum/minimum height and width for profiles.

 

Buckling settings

This tab defines the buckling lengths calculation method.

Buckling settings

Calculation Settings - Buckling

Method selection

Defines the buckling lengths calculation method:

Detect intersections along a super element for automatic buckling lengths: If it is not activated, then the auto calculation is performed considering the super element as a single member, no matter the intermediate intersections with the other members. If it is activated, then it calculates the buckling lengths separately for each segment/element of superelement, considering the intermediate intersections.

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.

 

Angle verification settings

Angle verification settings

Calculation Settings - Angle verification

 

In this tab you can set the bolt parameters for the calculation of the net area of sections (Longitudinal and transversal edge distance, bolt spacing and partial safety factor).

 

Calculation Sequence

This tab defines the verifications to perform during the steel calculation.

Calculation sequence

Calculation sequence

 

 

 

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