how to measure vibration of pedestrain bridge
how to measure vibration of pedestrain bridge
(OP)
Contractor who build the pedestrian bridge, also did the connection design of the bridge. Now main consultants say that the connections are flexible and as per there computer Model Bridge will vibrate. I took few people with me and walked over the Bridge. Do not feel anything. By the way is there any gage to measure vibrations?






RE: how to measure vibration of pedestrain bridge
The footbridge might vibrate under different loading conditions than you and a few other people walking on it. There are also minimum code requirements in terms of dynamic response of the footbridge that a change on the connection might affect.
Didn't the consultant approve the connection design? That is usually the process.
RE: how to measure vibration of pedestrain bridge
BTW, you won't be able to feel the vibe when you walk. Stand still and have someone else walk. You'll also need to walk at different frequencies. One frequency won't cause much vibe whereas another will.
As for modeling, in most cases, the connections are considered rigid for vibe. There's not enough force to break the friction. This is standard today for FEA of floors, footbridges, etc. Tell the EOR to see the latest British SCI design guide on the subject.
RE: how to measure vibration of pedestrain bridge
Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that them like it