Geotechnical News March 2011
29
GEOTECHNICAL INSTRUMENTATION NEWS
Geotechnical Instrumentation News
John Dunnicliff
Introduction
This is the sixty-fifth episode of GIN.
One full article and six one-pagers this
time.
Converting Strain Measured in
Concrete to Stress
This is a topic that has fascinated and
puzzled me for a long time. Unlike for
steel, the relationship between strain
and stress in concrete is by no means
straightforward because so many
factors, other than stress change, cause
strain. I struggled with guidelines when
writing the red book (Sections13.3.9
and 13.4.7) but have never felt that
they were adequate. Here’s an article
by Roberto Acerbis and his colleagues
in Italy and Australia, which does a far
better job than I did.
Web-based Data Management
Software
David Cook’s article “Fundamentals of
Instrumentation Geotechnical Database
Management – Things to Consider”
was in the previous GIN (December
2010). As said in my previous column,
I sent the article to several firms who
supply web-based data management
software, inviting each to respond with
a one-page “Ours will do this” article.
Here are those one-pagers, without any
editing by me.
I thought that I’d invited all firms
who supply web-based data manage-
ment software, but I goofed—others
have pointed that out. There’s an ad
on page 33 by SolData, whose “GEO-
SCOPE” is a fullweb and GIS software
hub for geotechnical, structural and en-
vironmental real-time data.
Next Instrumentation Course in
Florida
Dates are nowApril 3-5, 2011 at Cocoa
Beach. Details are on page 28 and on
.
Next International Symposium
on Field Measurements in
Geomechanics (FMGM)
As many of you will know, FMGM
symposia are organized every four
years, the previous one being in Boston
in September 2007. They are “the
places to be” for folks in our club.
The next FMGM will be in Berlin,
Germany on September 12-16, 2011.
Information is on
.
Closure
Please send contributions to this
column, or an article for GIN, to me as
an e-mail attachment in MSWord, to
, or by
mail: Little Leat, Whisselwell, Bovey
Tracey, Devon TQ13 9LA, England.
Tel. +44-1626-832919.
Wen Lie! (China).
Recommendations for Converting Strain
Measured in Concrete to Stress
Roberto Acerbis
Harry Asche
Guido Barbieri
Tiziano Collotta
Introduction
Geotechnical engineering involves
uncertainties,
arising
from
simplifications which are necessary
during the design phase, primarily
due to limited information about the
soil properties and behaviour. It is
important to monitor the performance
of structures during the construction
phase, to compare the actual loads
and stresses with those anticipated
during design. For concrete structures,
