Concrete Through Girder Bridge

[ReggieCruz]

Hi,

I'm designing a concrete through girder railway bridge (due to clearance constraint, I have to place the deck at the bottom flange) and I am not sure if I have to allow for U-Frame action on the deck and the deck connection to the girder?

Anyone aware of papers or discussion on this topic??? U-frame action in steel through girder are well documented and specified in design standards however, I cannot find any for concrete.
Appreciate any relevant response.
Cheers

 

[bridgebuster]

It sounds like a JMI channel bridge (it was a patented system), which is essentially a u-frame.

See if you can get a copy of "The Segmental Concrete Channel Bridge System" prepared by Civil Engineering Research Foundation, Report No. HITEC 96-01.

JMI was a spin-off of Figg & Mueller. The US operation designed a few of these bridges in the early-mid 90's; haven't heard of any one building one since. When the US operation was sold in '98 their European parent kept the patent.

 

[ReggieCruz]

Thanks! I'll look into it.

 

[ishvaaag]

Sesign of Modern Highway Bridges
Nerendra Taly
McGraw Hill 1998

addresses generically these bridges in section 5.2.6 Trapezoidal box and U-beam bridges, p. 515 to 523

Not a very normative outlook and mostly roadbridge, but quotes a number of references.

Theory and Design of Bridges
Petros P. Xanthakos
McGraw Hill 1994

addresses RC THROUGH GIRDER BRIDGES at section 3-7, p. 198 to 202, also roadbridge outlook, considers Girder-Slab Interaction and so implicitly recommends to consider frame action, even if in simple way; a more hands-on article.

Except that you be ample on stiffness, considering frame action for a railway bridge can't be but benefitial, since moder codes are quite stringent in specs for controlled deformation.

A seasoned publication on RC Slab-and-edge bridges

http://www.google.es/url?sa=t&rct=j...urce=web&cd=1&sqi=2&ved=0CE4QFjAA&url=http://

http://www.ideals.illinois.edu/bits...TvgZgH&usg=AFQjCNEr0dmPJLK2aJ9cK9FtbMrEZMJzcg

 

[ReggieCruz]

Hi Ishvaaag,

Thank you for the response. I cannot source the book in our office library soon enough but I wonder if you have a it? If it's not too much of an imposition, would you mind flicking me a copy of the relevant pages.

Appreciate your help.

Cheers

 

[ishvaaag]

Yes I have both home in paper, I will try the scan later ..., not cozy because both thick tomes.

 

[ishvaaag]

A zip holding the relevant Xanthakos info.

 

[ishvaaag]

And the zip holding the Taly info. Even if U shape mostly targeted to build later closed cell bridges ... not much info in the end.

I will be looking if I find examples in some magazines.

 

[ReggieCruz]

Thank a million for this!!! You're a prince among engineers.