Bridge with no bearings!
Bridge with no bearings!
(OP)
One of the structures on the contract I’m working on is to be constructed with no bearings. This is the first time I’ve encountered such a structure and was wondering is this normal practice?
The bridge consist of a 50m span deck sitting on an arch profile all cast in-situ and monolithically fix to the abutments.
The abutment themselves are 10m high from soffit to finish road level.





RE: Bridge with no bearings!
The reason, in this case, was the RR company's concern that a bridge with simple spans could more easily collapse during a train wreck under the bridge. As is typical on bridges over railway lines, both interior bents have substantial concrete collision walls that parallel the tracks.
This seemed unusual to me, too. So I saved the plans - on this occasion don't have to talk from memory, am looking at the plans right now.
www.SlideRuleEra.net
RE: Bridge with no bearings!
Tenessee is one of the leading DOT's on jointless bridges consequently for smaller structures, they are also bearingless.
MOst other DOT's are following suite and bearings can be expensive.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Bridge with no bearings!
RE: Bridge with no bearings!
Then I most ask the question. Why were bearings used in the first place? What has caused such a shift in design?
RE: Bridge with no bearings!
RE: Bridge with no bearings!
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Bridge with no bearings!
Ciao.
RE: Bridge with no bearings!
Hg
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