By Farhad Ansari
Contemporary advances in fiber optic know-how, and the opportunity of their use in civil buildings has instigated the improvement of a few examine actions within the civil engineering group. This ebook is meant for speedy dissemination of present state-of-the-art in this rising know-how. Fiber optic sensors, and clever constitution expertise were effectively hired in area and aeronautics functions. With minimum learn, those applied sciences could be utilized to civil constructions. Fiber optic sensors may help defend our infrastructure. This e-book comprises information about: strategies for dimension of pressure, temperature, strain and magnetic fields; clever constitution know-how; functions in fracture mechanics; and embedment in concrete
Read or Download Applications of fiber optic sensors in engineering mechanics : a collection of state-of-the-art papers in the applications of fiber optic technologies to civil structures PDF
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Additional info for Applications of fiber optic sensors in engineering mechanics : a collection of state-of-the-art papers in the applications of fiber optic technologies to civil structures
An enormous financial investment is associated with the established civil infrastructure: bridges, highways, railways, dams, pipelines, port facilities, airports and buildings. Aging of these structures represents a financial problem of immense proportions. Instrumentation of these structures with fiber optic sensors that could accurately assess their useful remaining life and schedule repair or replacement when required, could lead to substantial cost savings. Furthermore, we are witnessing a major change in the design and fabrication of large civil structures, like bridges, based on the replacement of steel with composite materials.
Wavelength demodulation is achieved by means of a passive, spectral ratiometric technique. FIBER OPTIC SENSORS 24 A particularly attractive form of this solution is the use of a free space noncontact form of communication between the structural component with the resident sensing system and its support structure, figure 6. We have recently demonstrated the concept of a Bragg grating laser strain sensor, using an erbium-doped fiber laser, figure 7. The wavelength of the laser can be seen to be a linear function of the strain impressed on the Bragg grating which was adhered to the surface of a cantilever beam, figure 8.
However before analysing the sensing phenomena in detail it is useful to briefly examine the embedding processes and their effects upon material properties. 3 Embedding Fibre Optics in CFRP and GFRP An essential part of the OS TIC programme was the thorough evaluation of the effects of embedding optical fibres into composite materials. The basic potential problem is that the fibres which are used as reinforcing members are typically a few microns in diameter. The optical fibre is itself typically 80 OSTIC PROGRAMME 43 to 125 microns in diameter.