Elasto-Plastic Bonding of Embedded Optical Fiber Sensors in Concrete

Mechanical Property and Strain Transferring Mechanism in Optical Fiber Sensors

“…Experiments were performed with a white-light fiber-optic interferometer to confirm the theory results. Li et al (2002) considered the coating as an ideal elasto-plastic material and deduced the strain transfer coefficients when the host material experiences tensile stress and compression stress respectively. Galiotis (1984) designed a polydiacetylene single fiber in an epoxy resin host material subjected to tensile strain along the fiber direction, and measured the strains at all points along the length of the fiber by the method of resonance Raman.…”

Full-scale test of a concrete box girder using FBG sensing system

“…The coefficient p e is the strain-optic coefficient of an optical fibre and can be determined from Eq. (3).…”

“…The applicability of fibre optic sensor to the internal strain measurement in concrete structures was successfully verified through the strain monitoring in concrete specimen [1][2][3] and the interface strain measurement of FRP-concrete composite structures [1]. Slowik et al [4] embedded FBG sensors in cement paste specimen to investigate early age shrinkage of cement paste.…”

“…Recently, fibre optic sensors have been successfully integrated with many civil engineering fields ranging from concrete structures [1][2][3][4][5][6][7] to soil problem [8]. A number of bridges have been successfully integrated with the fibre optic sensing system in order to the monitor static and dynamic response on bridge decks and columns [9][10][11][12][13][14][15].…”

Strain Transfer and Test Research of Stick-up Fiber Bragg Grating Sensors

“…Analysis of the elastic modulus and thickness of coating layer's influence on the stress transfer and stress (concentration). Explores the cladding [6], the characteristics of optical fiber sensors embedded concrete and its importance, and in view of the outside load parallel to the fiber direction applied to concrete members, the cladding of fiber optic sensor material properties and thickness of concrete internal stress concentration characteristics of some research are made. Fiber optic sensor test strain and concrete strain relationships was roughly got [7],also gives the corresponding optical fiber sensing mechanics model was given [8], but not considering the influence of the paste layer thickness, packaging materials, not easy to analyze issues of optical fiber sensor encapsulation, setting process.…”