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Re: Measurement of rebar stress[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Measurement of rebar stress
- From: "Mark D. Anderson PE" <mark(--nospam--at)alaskaengineer.com>
- Date: Thu, 12 Dec 2002 15:25:51 -0900
It sounds like you are talking about blind hole drilling techniques for measurement of in-situ strain/stress. A small rosette gage is laid on the surface, and then a tiny shallow hole is drilled in the center which relieves the surface strain at the boundary of the hole.
Be aware that what you will get is a measurement of the release of total in-situ surface strain, regardless of what it results from. So if there are significant residual stresses/strains at the surface, these will be indistinguishable from the strain/stress associated with in-service loading.
I would suggest a search of Micro Measurements or online with the phrase "blind hole drilling techniques" if you are looking for more information.
Mark D. Anderson PE
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