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Effects of Cutting a Strand Was:I am a Professional Engineer

Effects of Cutting a Strand Was:I am a Professional Engineer

Effects of Cutting a Strand Was:I am a Professional Engineer

(OP)
In response to ramezkamel's question in the previous thread.

A good example of what happens when the strand is cut or broken is the pedestrian walkway collapse at a Racetrack in North or South Carolina.  I don't remember if the bridge was pre or post stressed but I don't think that matters.  ENR (www.enr.com) reported on it in May(?).  IIRC, the Charleston, SC paper had some very good articles on what happened, etc.

Basically, the strand broke; the load was transferred to the other strands, exceeding their yeild strength; they stretched; the bridge buckled in the middle; about 10 seconds later it came to rest on the freeway below.  It was not an explosive collapse but a slow (relatively) stretching of the other cables until the halves formed a V.  Obviously, without the steel we would have had lots of little pieces of rubble instead of the intact halves.


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