Suggestions for design of bridge spanning thirteen meters?
Suggestions for design of bridge spanning thirteen meters?
(OP)
Hi! I'm supposed to design a bridge that spans 13 meters only and has a carriage width of about 9 meters. The problem is that a cement mixer weighing 30 tons has to pass through it.
I've already tried slab bridge with ACI specifications and a box culvert. Both resulted in a very thick bridge deck and high strength concrete. My superior asked me to explore other options. Does anyone have any other suggestions. Thanks!
I've already tried slab bridge with ACI specifications and a box culvert. Both resulted in a very thick bridge deck and high strength concrete. My superior asked me to explore other options. Does anyone have any other suggestions. Thanks!





RE: Suggestions for design of bridge spanning thirteen meters?
If the concrete truck is going through it, you obviously don't have to worry about scour. You might be able to save money with GRS wall abutments:
https://www.fhwa.dot.gov/publications/research/inf...
https://www.fhwa.dot.gov/publications/research/inf...
RE: Suggestions for design of bridge spanning thirteen meters?
RE: Suggestions for design of bridge spanning thirteen meters?
I am somewhat surprised that the concrete slab would be very thick and requires high strength concrete though, maybe we just have different definitions of very thick. 30 tons isn't a huge load for that span length. With Cat 777s I could see the slab depth getting a bit out of hand, but not for a 30ton concrete mixer.
RE: Suggestions for design of bridge spanning thirteen meters?
RE: Suggestions for design of bridge spanning thirteen meters?
RE: Suggestions for design of bridge spanning thirteen meters?
Though if it was H2SO3 I might have some concerns.
RE: Suggestions for design of bridge spanning thirteen meters?
Are you sure that is the correct weight? Are you designing for a bridge with a weight restriction below the legal limit? My 11-yard max. mixer trucks have a maximum legal GVW of 79,200 pounds - call it 40 tons.