Long-Period Fiber Grating Transverse Load Effect-Based Sensors for Rebar Corrosion in Concrete

A Long-Term Monitoring Method of Corrosion Damage of Prestressed Anchor Cable

“…The measurement methods of environmental parameters such as step-type corrosion fiber sensor [1][2][3], long-period fiber grating (LPFG) refractive index sensitive sensor [4], and fiber Bragg grating (FBG) refractive index sensitive sensor [5,6] are commonly used in this field. However, it enables one to indirectly reflect the corrosion of reinforcement.…”

“…For example, Gan Wei Zhong from Zhejiang University [1][2][3] designed a step-type corrosion fiber sensor to measure the position change of a concrete blunt front surface because concrete is gradually blunted before steel reinforcement corrosion and, moreover, its blunt front surface moves towards steel reinforcement with corrosion time. Liu Hong Yue et al [4] designed a LPFG steel corrosion sensor based on the refractive index magnitude of the ambient concrete around the reinforcement. Muhammad [5] and Tan [6] used HF acid to corrode FBG cladding and acquire the response relationship between FBG wavelength and its external refractive index.…”