Shear buckling of Web

[Jeremy1989]

Hi all,

I hope someone could point me to the right direction for my queries below. I am not a structural engineer myself:

I understand that shear force exerted on a web could induce buckling load on it and also induce compressive load on the stiffener. I also understand that there are literature works done on it and also in textbooks to determine the shear buckling Margin of Safety and the compressive load on the stiffener.

However, from the literature I have read and understand, they only cover for web without any form of mounted mass on it (i.e. a plain web panel). May I known if anyone knows of a literature work or formulas that could be used to determjne the shear buckling Margin of Safety and the compressive load on the stiffener?

Appreciate any advice. Thank you.

 

[12345abc6ttyui67]

I've only had to check it once or twice, and I'm sure there will be books about it, but when I feel a check is warranted I treat the stiffener(s) as compression element(s) (e.g. columns) and check them as per the code provisions for columns in compression. Usually I don't take into account the partial restraint offered by the stiffener to web weld (e.g. just assume pinned top and bottom) so I presume this is a fairly conservative analysis.

 

[JoshPlumSE]

AISC Design Guide 13: Wide Flange Stiffening at moment connections would be a good place to start. I believe they give some guidance for the stiffener design itself.

 

[rb1957]

compression in the stiffener is a result of the buckled web, refer diagonal tension, wagner beams, post buckled webs. This is elastic behaviour.

don't understand the comment "web without any form of mounted mass on it" ... are you looking at an item of mass mounted onto a web (and want to figure out the impact on the web) ?

Our typical analysis for diagonal tension (based on NACA 2661 and 2662) derives the resulting compressive load in the stiffeners.



another day in paradise, or is paradise one day closer ?

 

[Jeremy1989]

Hi all, thanks for the advice.

To rb1957 - yes I would like to find out the impact of a mass which is to be mounted on the web.

 

[rb1957]

I think the biggest impact is the flexibility of the mounting. If I had my choice, I'd add stiffeners to the web (improving shear buckling by reducing the panel dim'ns) and attach the mass to the standing legs.

another day in paradise, or is paradise one day closer ?