Bridge Crash Wall Loads
Bridge Crash Wall Loads
(OP)
Does any one have a reference on how to design a crash wall at a bridge pier. AREMA provides the minimums for the geometry of the crash wall, but not design loads.
The MBTA provides a little information, but it is incomlete and does not recommend any methods for design.
TIA for any help.
The MBTA provides a little information, but it is incomlete and does not recommend any methods for design.
TIA for any help.






RE: Bridge Crash Wall Loads
From TxDOT Design Manual:
"Sufficient horizontal clearance between an interior support for a highway bridge and an under-crossing railroad track must be provided or a crash wall is required to reduce the chance of the highway bridge collapsing after a hit from a shifted load on a train or a train derailment. When the clear distance from the centerline of the track to the face of the columns is less than 25 ft. but greater than or equal to 12 ft., a crash wall extending 6 ft. above the top of the rail is required. When the clear distance from the centerline of the track to the face of the columns is less than 12 ft., a crash wall extending 12 ft. above the top of the rail is required. Crash walls must extend 4 ft. below grade at the base of the wall and be at least 2 ft.-6 in. thick. Minimum reinforcing steel areas usually govern. See AREMA Chapter 8, Section 2 for complete provisions and the Commentary for AREMA Chapter 8 for a useful graphical representation of the provisions."
RE: Bridge Crash Wall Loads
There are no requirements for the loading, that I am aware of, in that manual.