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23 results on '"Gowripalan, Nadarajah"'

3. An Innovative Technique to Measure Lateral Pressure of Self-Compacting Concrete Using Fiber Bragg Grating Sensor.

Author

Shakor, Pshtiwan, Gowripalan, Nadarajah, and Rocker, Paul

Subjects
SELF-consolidating concrete, FIBER Bragg gratings, WATER pressure, TRANSDUCERS, OPTICAL fiber detectors
Abstract

Self-compacting concrete (SCC) is the most flowable concrete type that exerts high pressure on formwork. SCC is the most commonly used concrete globally for construction applications due to its cost-effectiveness. However, to make a formwork resist the exerted lateral pressure of SCC, it is required to have a suitable design for formwork. This paper presents a novel approach on how could create and prepare the Fiber Bragg Grating (FBG) optics using as a sensor to measure lateral pressure and temperature of SCC. To ensure the FBG sensor works properly a validated methodology is conducted. In the first stage, FBG sensors are calibrated with temperature sensitivity and then are calibrated with water pressure. The latter calibration is used to verify lateral pressure with SCC. However, this is not the only sensor used to record the result, a genuine sensor such as a transducer sensor has been positioned close to the FBG sensor to validate the results of the FBG sensor. The created FBG sensor demonstrates highly promising results, effectively validating the outcomes of the transducer sensor, while also reducing costs and enhancing usability for construction applications. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Monitoring of shrinkage and creep of concrete using fibre Bragg grating sensors

Author

Wong, Allan, Childs, Paul, Peng, Gang-Ding, and Gowripalan, Nadarajah

Subjects
Fibre Bragg grating, shrinkage, concrete, creep
Abstract

Fibre Bragg grating (FBG) sensors are used for the experimental investigation of two of the most important time-dependent properties of concrete: drying shrinkage and creep. A swept wavelenght system is used as the interrogation technique. The FBG sensors are embedded directly into structural grade concrete specimens. Standard mechanical method is used in parallel with embedded FBG sensors. Both mechanically and optically measured time-dependent strains are discussed. It is shown that the FBG sensors offer a better alternative to the conventional electrical and mechanical methods, in the measurement of long-term time-dependent strains., 5th International Conference on Optical Communications and Networks & the 2nd International Symposium on Advances and Trends in Fiber Optics and Applications; Chengdu & Jiuzhaigou, China

Published
2006
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13. Monitoring of shrinkage and creep of concrete using fibre Bragg grating sensors

Author

Wong, Allan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Childs, Paul, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Peng, Gang-Ding, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Wong, Allan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Childs, Paul, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Peng, Gang-Ding, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, and Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW

Abstract

Fibre Bragg grating (FBG) sensors are used for the experimental investigation of two of the most important time-dependent properties of concrete: drying shrinkage and creep. A swept wavelenght system is used as the interrogation technique. The FBG sensors are embedded directly into structural grade concrete specimens. Standard mechanical method is used in parallel with embedded FBG sensors. Both mechanically and optically measured time-dependent strains are discussed. It is shown that the FBG sensors offer a better alternative to the conventional electrical and mechanical methods, in the measurement of long-term time-dependent strains.

Published
2006

14. Evaluation and monitoring of long-term performance of FRP-concrete composites for infra-structure applications

Author

Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Peng, Gang-Ding, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, and Peng, Gang-Ding, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW

Published
2005

15. Proceedings of ACUN-4: Composites Systems: Macrocomposites, Microcomposites, Nanocomposites

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Rizkalla, S, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, and Rizkalla, S

Published
2002

16. A study of the fibre matrix interface in carbon fibre reinforced reactive powder concrete composites by atomic force microscopy and FESEM

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, and Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW

Published
2000

17. Composites in the Transportation Industry

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Drayton, N, Heslehurst, R, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Drayton, N, and Heslehurst, R

Published
2000

18. Proceedings of the ACUN-2 International Conference: Composites in the Transportation Industry (Vol 2)

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Drayton, Noel, Heslehurst, Rikard, Aerospace, Civil & Mechanical Engineering, Australian Defence Force Academy, UNSW, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Drayton, Noel, and Heslehurst, Rikard, Aerospace, Civil & Mechanical Engineering, Australian Defence Force Academy, UNSW

Published
2000

19. Preliminary studies of carbon fibre reinforced cementitious composites by AFM and FESEM

Author

Kaog, G J P, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Kaog, G J P, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, and Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW

Published
2000

22. Innovations and structural applications

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Rizkalla, S, Dutta, P, Bhattacharyya, D, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Rizkalla, S, Dutta, P, and Bhattacharyya, D

Published
1999

23. Atomic force microscopy study of carbon fibre reinforced cementitious composites

Author

Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Kao, G, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Postle, Ronald, Mathematics & Statistics, Faculty of Science, UNSW, Bandyopadhyay, Srikanta, Materials Science & Engineering, Faculty of Science, UNSW, Kao, G, Gowripalan, Nadarajah, Civil & Environmental Engineering, Faculty of Engineering, UNSW, and Postle, Ronald, Mathematics & Statistics, Faculty of Science, UNSW

Published
1999

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