## Robot Structural Analysis

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic to the Top
- Bookmark
- Subscribe
- Printer Friendly Page

# Steel slederness ratio limit, Lambda, max per Eurocode

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

Dear All,

Does anyone know the equation for calculating Lambda, max per Eurocode?

My section fails global stability check as the section slenderness ratio about z axis,Lambda,z, is larger than Lambda, max value.

I have tried to look for the equation in the code, but I am totally unlucky.

Attached please find the calculation note printed from Robot.

The global stability check in on the last page.

Thank you in advace and appreciate any helps.

Sangduan

# Re: Steel slederness ratio limit, Lambda, max per Eurocode

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

As it is written, point 6.3.1.2.

Max(Lambda,y/Lambda,max ; Lambda,z/Lambda,max) - means max of calculated slendernesses is found and presented

Lambda,max - from Configuration

**Rafal Gaweda**

# Re: Steel slederness ratio limit, Lambda, max per Eurocode

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

Thank you Rafal for your answer.

Sangduan

# Re: Steel slederness ratio limit, Lambda, max per Eurocode

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

A **max** value of slenderness is defined only in EC8, 6.7.3 for members of braces (if anyone have seen a similar limitation for slenderness in EC3 it would be helpful for this issue).

Rafal, the window of configuration that you attached is different than the one that is displayed on me..(?)

# Re: Steel slederness ratio limit, Lambda, max per Eurocode

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

* A max value of slenderness is defined only in EC8, 6.7.3 for members of braces (if anyone have seen a similar limitation for slenderness in EC3 it would be helpful for this issue).*

You are right there is no lambda limit in EC3.

You may set it as high as you like.

* Rafal, the window of configuration that you attached is different than the one that is displayed on me..(?)*

Different code (norm) polish vs EN

**Rafal Gaweda**