bridge loading
bridge loading
(OP)
I'm trying to determine the appropraite desing loading of a bridge to accomodate off-highway type articulated dump trucks. Any thoughts would be appreciated. Thanks in advance.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: bridge loading
RE: bridge loading
RE: bridge loading
RE: bridge loading
RE: bridge loading
the trucks we're looking at are/similar to a CAT 3-axle articulated truck (model 730). they have a GMW of 110,000 pounds and an operating width of 9'6"
RE: bridge loading
Is this a temporary or permanant bridge? It sounds temporary. You may want to look at the temporary works specification that AASHTO publishes to see if there are any requirements that can be overlooked for the temporary structure. Obviously fatigue will not be an issue for a construction brigde constucted from new steel.
Hope this is helpful.
RE: bridge loading
RE: bridge loading
RE: bridge loading
I recommend looking at AASHTO Standard Specifications for Highway Bridges 17th edition (2002) and AASHTO Guide Design Specifications for Bridge Temporary Works (1995 or latest edition). Some combination of the information in these two publications may be applied as engineering judement dictates.
RE: bridge loading
the bridge will be permanent. the vehicle I noted previously with a GMW of 110,000 lbs has an axle distribution of 30%, 34.9%, and 35.1% between the front/steering axle and the two axles under the dump body.
from research I've done, the design rating would probably be HS-25, the HS-20 loading is max'd at 80,000 lbs.
RE: bridge loading