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Performance of distributed optical fiber sensors embedded inside reinforced concrete structural elements.
Tesi en modalitat de compendi de publicacions ; The employment of a novel cutting edge strain monitoring technique named Distributed Optical Fiber Sensors (DOFS) as Structural Health Monitoring (SHM) tools is becoming increasingly common. Its popularity can be attributed to multiple reasons, the most important of which are the possibility of performing completely spatially distributed monitoring with sampling points at distances smaller than 1 mm, the high degrees of deployment configuration complexity thank to DOFS’ size and minimal stiffness, ease of deployment and resistance to Electro-Magnetic Interference, corrosion and extreme temperatures. Due to the inherent nature of SHM, though, up to now, the most common DOFS applications are the monitoring of already built structures and substantiation of their suitability to continue performing as per design. Consequently, most DOFS deployments see their bonding to the external surfaces of RC structures. A novel way of deploying DOFS that has taken hold in the later years consists in adopting DOFS to monitor the evolution of the strains present on the inside of a Reinforced Concrete (RC) structure i.e., bonding DOFS to the surface of embedded reinforcement bars (rebars) or embedding them directly in the concrete mass. Due to its recency, this application is characterized by an almost untapped potential pool. Indeed, SHM-wise, this continuous and highly sensible embedded monitoring system provides access to the ability of starting to detect deformations and damages as early as their appearance inside the structure (versus having to wait for their appearance on their external surface). This superior deformation and damage detection potential can very well help replacing the current time-based inspection model with one based on a performance or risk-based approach. As a consequence, today’s maintenance paradigm could shift from corrective to preventive, resulting in tremendous savings in infrastructure maintenance and a reduction of its associated social impact. Yet, ...
Performance of distributed optical fiber sensors embedded inside reinforced concrete structural elements.
Tesi en modalitat de compendi de publicacions ; The employment of a novel cutting edge strain monitoring technique named Distributed Optical Fiber Sensors (DOFS) as Structural Health Monitoring (SHM) tools is becoming increasingly common. Its popularity can be attributed to multiple reasons, the most important of which are the possibility of performing completely spatially distributed monitoring with sampling points at distances smaller than 1 mm, the high degrees of deployment configuration complexity thank to DOFS’ size and minimal stiffness, ease of deployment and resistance to Electro-Magnetic Interference, corrosion and extreme temperatures. Due to the inherent nature of SHM, though, up to now, the most common DOFS applications are the monitoring of already built structures and substantiation of their suitability to continue performing as per design. Consequently, most DOFS deployments see their bonding to the external surfaces of RC structures. A novel way of deploying DOFS that has taken hold in the later years consists in adopting DOFS to monitor the evolution of the strains present on the inside of a Reinforced Concrete (RC) structure i.e., bonding DOFS to the surface of embedded reinforcement bars (rebars) or embedding them directly in the concrete mass. Due to its recency, this application is characterized by an almost untapped potential pool. Indeed, SHM-wise, this continuous and highly sensible embedded monitoring system provides access to the ability of starting to detect deformations and damages as early as their appearance inside the structure (versus having to wait for their appearance on their external surface). This superior deformation and damage detection potential can very well help replacing the current time-based inspection model with one based on a performance or risk-based approach. As a consequence, today’s maintenance paradigm could shift from corrective to preventive, resulting in tremendous savings in infrastructure maintenance and a reduction of its associated social impact. Yet, ...
Performance of distributed optical fiber sensors embedded inside reinforced concrete structural elements.
2021-09-06
TDX (Tesis Doctorals en Xarxa)
Theses
Electronic Resource
English
DDC:
624
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