french institute of science and technology for transport ... - Ifsttar

Research orientation R_Durability, hazards and nuisances
Reconstruction obtained using the 3D
inversion approach on real data obtained
from two lines of electrodes placed
transversally and longitudinally to the dyke
(at the EDF site).
(EDF) in order to compare our developments with
the complexity of real cases.
Possibilities for the future include validation at new
sites, gradually integrating the tools within operational
methods, and research involving contributions from other
domains (geophysics, geomechanics, thermics, hydraulics
and geostatistics).
@ CONTACT
sergio.lopes@ifsttar.fr
Monitoring structural health
A new health record
Civil infrastructure (bridges, buildings, networks etc.)
is constantly and continuously subjected to aggressive
environments, the ageing of its members or materials, or
changing or exceptional operating conditions.
These factors amplify the effect of the smallest error
in design or construction or accidental damage that speeds
up or sets off new types of structural deterioration. The result
is a considerable reduction in durability and service life.
But actions that involve maintenance, repair, or limiting or
stopping operation are only justified if we have valid methods
for evaluating the structure’s residual strength capacity and
serviceability.
In order to evaluate the performance of structures more
accurately, or at least obtain an opinion that is sound and
objective, we therefore need to be able to characterize the real
behaviour of the structure sufficiently precisely. This process
of determining, monitoring and evaluating the serviceability
of structures is the basis of the Structural Health Monirtoring
(S3) project.
The principal goal of S3 national research project, which
ended in 2011, was to specify a comprehensive integrated
design procedure for structural health monitoring for the
diagnosis and appraisal of structures. The various stages of the
project corresponded to a number of research and development
requirements for information technology tools, experimental
methods, analytical tools, application scenarios, and
the drafting of recommendations. This project was made possible
by funding from the Île-de-France Region and MEDDTL.
@ CONTACT
andre.orcesi@ifsttar.fr
49
Structural Health
Monitoring on the bridge
over the Adour in Bayonne
(SNCF) – optical strand
instrumentation.
Optical strand (in protective hose)
Recording of the passage
of a double TGV trainset
ANNUAL REPORT 2011 ifsttar.fr