Feb 17, 2007 · Your local prestress supllier usually has design aids for this sort of question. This is basically an estimate that you can go further into design with. As with going through the design process, think of the problem from the beam side. i.e. @ transfer, just the beam @ deck pour, beam supports beam and deck @ final, composite section carries ...

Jul 17, 2006 · A kicker beam will be used at the end of the bridge to carry the additional deck required for the radius. The main fascia girder the kicker will frame into is a two span continuous steel girder and the kicker will frame in at about the 1/4 point of the fascia girder.

Dec 29, 2009 · Hi, I am struggling to find a filler beam design example for a road bridge - if you happen to have one handy and were willing to share that would be much appreciated. Thank you.

Oct 25, 2010 · Under the grade beam, a compressible void former or "cushion" is placed to prevent heaving of the beam. Piles are used to carry the grade beam reactions. Design of grade beams is no different than design of any concrete beam except that top and bottom reinforcement is normally continuous with laps of bottom steel at piles and top steel at ...

Mar 5, 2009 · Looking at your drawing....at the opposite side of the creek from the radius...the roadway, widen the roadway to fit your bridge beam width (72'-0" shown). Transition your roadway from existing width to bridge width. Eliminate the 32' box beams and associated bents. {This should allow for the cost of addition box beams, see below}

Aug 29, 2007 · I am reviewing a technical proposal for a bridge design to use a Florida I-Beam in place of AASHTO beams. I have read FDOT's write up of the benefits of the shape and the FIB seems to provide several advantages over AASHTO beams, specifically span lengths and stability. The information I have is a few years old.

May 6, 2010 · I am working on a project where a stream was not located during preliminary design and did not get picked up until drawings were at 100%. We went back and redesigned the last 2 spans to create a 3 span condition to keep the piers out of the stream. When the bridge was 2 span, we had expansion...

Feb 15, 2020 · There are hand calculations that can be done from various books ("Time-dependent behaviour of concrete structures" by R. I. Gilbert is a good one), but I would normally run this through software like Midas or Autodesk Structural Bridge Design which will work out your long-term deflection in a few seconds (and I believe …

Mar 14, 2002 · In general most of the bridges that I have designed have very little live load going to the exterior beam because of the lane configuration. This load is never as high never as for an interior beam. AASHTO 3.23.2.3.1.4 requires that the exterior beam to have the same or greater capacity than interior beams.

Nov 14, 2006 · In the 17th Edition of AASHTO for Slab Edge Beam Design (3.24.8) a live load moment is given of 0.10PS where P=16k for HS20 and S is the Span Length.