I'm currently working on an abutment design for a single span bridge on rural road in western Massachusetts. I am planning on looking at all applicable load combinations for two loading cases. For the first case I would consider a 10 year flood condition and for the second case I would...
In the AASHTO load factor design load combinations IV, V, VI there is a term (R + S + T), the R is defined as Rib Shortening. I have a good handle on S & T, but am unsure of what rib shortening is... can someone explain to me in what type of structure one would have to consider this effect...
Can someone help explain this section to me? I'm working on a 100' long single span bridge... Is this section pertinent to developing overturning forces on an abutment? The way I interpret the section is that for a simple span design this force will counter act some of the dead load of the...
I'm currently working on an abutment design for a bridge out in Lee, MA. In a couple of my load conditions the water table is above the top of footing.
Basically, the abutment footing is 3' thick; there is 5' of saturated soil above the footing, then 2' of dry soil above that.
The geotech...
Hello all,
I am currently working on some preliminary design calculations for a bridge in Lee, MA that spans over the Housatonic River. The design span is 100', and the cross section is composed of (6) 48" deep spread box beams. Unfortunately, due to several site constraints, the bottoms of...
