Fibre optic sensors in civil engineering structures

2000 ◽  
Vol 27 (5) ◽  
pp. 880-889 ◽  
Author(s):  
R C Tennyson ◽  
T Coroy ◽  
G Duck ◽  
G Manuelpillai ◽  
P Mulvihill ◽  
...  
Keyword(s):  
Civil Engineering ◽  
Concrete Structures ◽  
Local Strain ◽  
Bragg Gratings ◽  
Fibre Optic ◽  
Engineering Structures ◽  
Arbitrary Length ◽  
Fibre Optic Sensor ◽  
Optic Sensor ◽  
Civil Engineering Structures

This paper presents an overview of the development and application of ISIS fibre optic sensor (FOS) technology by the University of Toronto Institute for Aerospace Studies and Department of Electrical and Computer Engineering. The primary focus of this technology has involved the use of fibre Bragg gratings (FBGs) to measure strain and temperature in concrete structures and fibre reinforced plastic (FRP) overwraps applied to concrete structures. A brief review of existing fibre optic sensor configurations and the advantages of using FOS compared to other strain sensors is first presented. Subsequently, the development of new sensor concepts such as a long gauge of arbitrary length, a distributed gauge for measuring local strain gradients, and multiple FBGs on a single fibre optic cable are discussed, with examples of their application to civil engineering structures. In addition, the specialized instruments under development that are essential for obtaining strain information from these sensors are also described. Finally, the issue of wireless remote monitoring of FOS systems is addressed.Key words: fibre optic sensors, Bragg gratings, civil engineering structures, instrumentation.

3D Printing of Concrete Structures Modelled by FEM

2020 ◽  
Vol 309 ◽  
pp. 261-266
Author(s):  
Michaela Vaitová ◽  
Libor Jendele ◽  
Jan Červenka
Keyword(s):  
3D Printing ◽  
Concrete Structure ◽  
Civil Engineering ◽  
Concrete Structures ◽  
Fem Analysis ◽  
Software Tool ◽  
Nonlinear Fem ◽  
Engineering Structures ◽  
Civil Engineering Structures ◽  
Extrusion Technology

This paper presents the possibility to utilize the 3D printing technology in civil engineering field specifically for concrete structures. Since this technology is booming last years and spreads in different fields of industry, the tools to analyse structures in such a way is important. Many research groups worldwide try to develop cement-based material suitable for 3D printing so that it might be used for civil engineering structures. Moreover, this technology brings necessity to check the safety of the structure at early ages of concrete. Therefore, the modelling and simulation of the digitally printed concrete structure would be of great help for such effort. The software tool that enables simulation of digitally printed concrete structure using a nonlinear FEM analysis is presented. ATENA is well established tool for such analyses of civil engineering structures made of concrete. The new module for digital printing simulation is developed as an additional feature of ATENA software. The 3D extrusion technology is supported. The paper describes the whole procedure how to model and analyse such structures and stress out all the differences compared to analyses of structures produced by traditional manner. The structure itself is modelled as usual in FE software, whereby based on velocity of printing head the time of printing, i.e. production of each element is calculated. It is later used to activate the elements during analysis and it also influence the material behaviour, such as shrinkage, strength etc.

A new fibre optic sensor independent of temperature variations and fabricated with fibre Bragg gratings

2004 ◽  
Author(s):  
J. C. Roig ◽  
R. Garcia ◽  
S. Sales ◽  
Jose Capmany ◽  
Beatriz Ortega ◽  
...  
Keyword(s):  
Bragg Gratings ◽  
Fibre Optic ◽  
Temperature Variations ◽  
Fibre Optic Sensor ◽  
Optic Sensor ◽  
Fibre Bragg Gratings

Fibre optic sensor of electrostatic field with mechanical resonator

1994 ◽  
Author(s):  
Alexander V. Churenkov ◽  
Maksim A. Skorobogatiy ◽  
A. D. Loiko
Keyword(s):  
Electrostatic Field ◽  
Fibre Optic ◽  
Mechanical Resonator ◽  
Fibre Optic Sensor ◽  
Optic Sensor
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