Truss Bridge - HLMR retrofit
Truss Bridge - HLMR retrofit
(OP)
Does anyone have any knowledge of a truss rehabilitation project (anywhere in the world) that involved installing an HLMR bearing at / near one of the panel points to effectively replace the pin?







RE: Truss Bridge - HLMR retrofit
RE: Truss Bridge - HLMR retrofit
Take a look at the first presentation in this video. It is about a project involving pin and hanger replacement at the junction of cantilever-suspended spans. You may get some useful ideas that may be applicable to your rehab project.
http://media.aisc.org/NASCC2016/B06.mp4
RE: Truss Bridge - HLMR retrofit
what I posted were just conceptual sketches that someone else created, so I can't (and wouldn't) trust them as bible verse.
...plus this is a really weird bridge.
@ EQguys:
Thanks for the link! Now I have something to do this weekend.
Happy Labor Day, all!
RE: Truss Bridge - HLMR retrofit
Seems questionable to me without some form of movement limiting venue as it would lead to a loss of vertical bearing and collapse.
Mike McCann, PE, SE (WA)
RE: Truss Bridge - HLMR retrofit
@justhumm - are you free to identify the bridge? In the AISC presentation the one relevant to your situation is the first one up.
@EQguys - thanks for the link; interesting presentations.
RE: Truss Bridge - HLMR retrofit
At this point, I have no idea what happens to the joint. That's why I am hoping to stumble over a project that actually used this sort of retrofit. :-)
Conceptually, I THINK the "safety pin" that was shown on the sketch is meant to limit the movement.
@bridgebuster
No, I am not at liberty to divulge the bridge identity, right now.
I just watched the first minute or two of the video. I'm going to watch the rest of it later tonight or tomorrow. I was actually able to find the bridge plans for that project on MDOT's website. It's not exactly what I was hoping for, but might make good food for thought...
http://sp.mdot.ms.gov/Contract%20Administration/DesignBuild/MDOT%20Project%20No%20BR001501120106487301000%20US%2084%20Pin/Forms/AllItems.aspx
http://sp.mdot.ms.gov/Contract%20Administration/DesignBuild/MDOT%20Project%20No%20BR001501129106736301000%20Westbound/Previous%20Project%20%E2%80%93%20Bridge%20Plans.pdf (100+ MB file)
RE: Truss Bridge - HLMR retrofit