Surface-Mounted Distributed Fiber Optic Sensor Measurements, and Concrete Damaged Plasticity Modeling for Damage Analysis of Reinforced Concrete Beams

Jayawickrema, U. M. N. and Kumar, A. S. and Herath, H. M. C. M. ORCID: and Hettiarachchi, N. K. and Sooriyaarachchi, H. P. and Epaarachchi, J. A. (2021) Surface-Mounted Distributed Fiber Optic Sensor Measurements, and Concrete Damaged Plasticity Modeling for Damage Analysis of Reinforced Concrete Beams. In: ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS2021), 14 Sept - 15 Sept 2021, United States and Online.


Structural health monitoring (SHM) has become an integral part of essential and costly to replace infrastructures such as bridges and buildings which degrade during their lifetime. Understanding the structural behaviour of these infrastructures is critical for assuring their structural integrity and safe operating conditions. In this study, the structural performance of a reinforced concrete beam was examined under flexural loading. Distributed optical fibre sensor (DOFS) was attached to the beam's bottom surface, and Optical Backscattered Reflectometry (OBR) technology was used to measure the surface strain. A three-point bending test was performed, and the sensor responses were acquired. Unusual high strain peaks were observed at the bottom surface of the beam due to the formation of hairline cracks. Subsequently, the Concrete Damaged Plasticity (CDP) based Finite Element Analysis (FEA) was performed to simulate the plastic behaviour of concrete beam using ABAQUS 2019 commercial software. The FEA results have strong agreement with the strain pattern observed from the DOFS. Therefore, DOFS and CDP technique based FEA can be successfully used to investigate the plastic damage pattern inside the concrete beam and distributed sensing demonstrates a greater capacity for long-term monitoring of the structural health of concrete structures.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Virtual conference. Files associated with this item cannot be displayed due to copyright restrictions
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021)
Date Deposited: 19 Apr 2022 00:39
Last Modified: 31 May 2022 02:42
Uncontrolled Keywords: Concrete damaged plasticity; Damage prediction; Distributed optical fibre sensing; Reinforced concrete structures; Strain measurement; Structural health monitoring
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401706 Numerical modelling and mechanical characterisation
40 ENGINEERING > 4005 Civil engineering > 400599 Civil engineering not elsewhere classified
40 ENGINEERING > 4017 Mechanical engineering > 401799 Mechanical engineering not elsewhere classified
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