REFERENCE FOR DESIGN FOR BOX GIRDERS 4

[CHARLESCOSTA]

Hi
I am in need of some good reference book on design of steel box girders.I specifically need the moment of inertia requirements for diaphragms
at the point of eccentric loading where torsional moment and a vertical load is applied to only one web(like from cantilever platforms attached to one web only).Any help would be highly appreciated.
Thanking you in advance for your help.

 

[dik]

The Lincoln foundation had a publication on the design of orthotropic plates; I don't know if it's still available...

Dik

 

[Qshake]

Orthotropic is likely only going to give small three-sided boxes and trapezoidal shapes with no diaphragms to speak of.

The best shot here is one of the AISC Design of Steel Highway Bridges Handbook. In it they have design examples of steel box girders. While the analysis is done by computer, most of the design components are shown by hand for clarity.

As I recall there is a box available on the design of box girders...just don't recall the author or date, but I know it is from the 70s.

Regards,
Qshake

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

 

[Qshake]

I meant to say there is a text available on the design of steel box girders. Very theoretical as I recall.

Regards,
Qshake

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

 

[VoyageofDiscovery]

Is this cantilever loading attached directly to the web?

Is this steel box girder composite with a concrete deck?

VOD

 

[bridgebuster]

An example for a curved box girder bridge:

http://bridges.transportation.org/?siteid=34&pageid=339

 

[minorchord2000]

Thanks for that great link, bridgebuster!

 

[bridgebuster]

your welcome

 

[dik]

Ditto... Dik

 

[VoyageofDiscovery]

CHARLESCOSTA,

With boxes torsional warping stresses should be looked at, the provided manual states that if less than 10% of long. bend. stress there is no need to consider it.

HTH

VOD

 

[CHARLESCOSTA]

Thanks for all your replies.I am referring to steel box girder with plate diaphgrams like the ones used in
overhead cranes where drive platforms are directly attached to one web.Voyageofdiscovery which manual are you referring to?

 

[VoyageofDiscovery]

Hi,

The "manual" I refer to is the "AASHTO-LRFD DESIGN EXAMPLE HORIZONTALLY CURVED STEEL BOX GIRDER BRIDGE". This is obviously specific to bridge design.

 

[VoyageofDiscovery]

I should have said "example", my mistake.

 

[bridgebuster]

I just remembered this tub girder link from the National Steel Bridge Alliance; you hit 50 and CRS sets in.

http://www.steelbridges.org/pages/nsbapublications.html

CRS - Can't remember $#!+

 

[VoyageofDiscovery]

Another good link, bridgebuster.

 

[bridgebuster]

thanks