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Investigation of strain transfer to a sensor protection system embedded in concrete using finite element analysis



Title: Investigation of strain transfer to a sensor protection system embedded in concrete using finite element analysis
Author(s): A. Hameed, G. F. Fernando, J. G. Hetherington, R. D. Brown, J. Leng, R. A. Barnes
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 253
Issue date: 2002-11-01
Publication year: 2002
Pages: 557 - 563
Total Pages: 7
Nb references: 11
Language: English


Abstract: Optical fibre-based sensor systems are being used increasingly in civil engineering applications where structural integrity monitoring is of interest or concern.
This paper reports on an optimisation scheme for an optical fibre-based sensor protection system designed to protect and enhance the strain-transfer characteristic when it is embedded in concrete.
The sensor protection system consisted of a stainless steel tube with specified flange designs.
Three flange designs were considered:disc,cone and inverted cone.
Non-linear finite element analysis incorporating contact logic was performed to select and optimise the shape and dimensions of the flange.
The analysis showed high stress concentrations in the vicinity of the flanges.
However this effect was localised and was not transmitted to the intended location of the sensor.
The results showed that all three flange designs were effective but the 5 mm diameter disc-shaped flange gave the best results in terms of the magnitude and symmetry of the shear stress at the tube-concrete interface.


Online publication: 2002-09-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13899


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