Abstract
The application of structural health monitoring (SHM) systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures’ conditions and increasingly lead to a more cost-effective management of those infrastructures. In this field, the use of fiber optic sensors has been studied, discussed and practiced with encouraging results. The possibility of understanding and monitor the distributed behavior of extensive stretches of critical structures it’s an enormous advantage that distributed fiber optic sensing provides to SHM systems. In the past decade, several R & D studies have been performed with the goal of improving the knowledge and developing new techniques associated with the application of distributed optical fiber sensors (DOFS) in order to widen the range of applications of these sensors and also to obtain more correct and reliable data. This paper presents, after a brief introduction to the theoretical background of DOFS, the latest developments related with the improvement of these products by presenting a wide range of laboratory experiments as well as an extended review of their diverse applications in civil engineering structures.
Highlights
These authors, taking into account the risk of optical fiber breakage when the stress. These authors, taking into account the risk of optical fiber breakage when the stress generated by the crack is very high and the fact that this developed algorithm was only suitable if generated by the crack is very high and the fact that this developed algorithm was only suitable if local local stress was redistributed over a minimum length of 10 cm, decided to create, at the location of stress was redistributed over a minimum length of 10 cm, decided to create, at the location of the crack, the crack, a mechanism of sensor delamination to ensure that the system would continue to perform a mechanism of sensor delamination to ensure that the system would continue to perform even for even for high strain levels
These proved the ability of the strain changes coincided with locations of damage in the pipeline
Within this topic, optical fiber sensors (OFS) has suffered an exponentially increase of interest and as a result, several studies and applications have been presented in the past years
Summary
The highway and railway transportation systems are considered to be some of society’s critical foundations In this complex system, bridges and viaducts assume an important role because of their distinct function of joining these networks as their crucial nodes. A structure, especially in the present days, must be able to reliably produce information regarding any alterations in its structural health condition and communicate it to the responsible operators and decision makers both in a timely way and either automatically or on-demand in order to decrease these costs. One significant reason for this is the lack of reliable and affordable generic monitoring solutions [12]
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