[논문]Deflection estimation of a full scale prestressed concrete girder using long-gauge fiber optic sensors

doi:10.1016/j.conbuildmat.2006.08.007

Deflection estimation of a full scale prestressed concrete girder using long-gauge fiber optic sensors

Construction & building materials, v.22 no.3, 2008년, pp.394 - 401

Chung, Wonseok (Track and Civil Engineering Research Department, Korea Railroad Research Institute, Republic of Korea) , Kim, Sungil (Track and Civil Engineering Research Department, Korea Railroad Research Institute, Republic of Korea) , Kim, Nam-Sik (Department of Civil Engineering, Pusan National University, Republic of Korea) , Lee, Hee-up (Track and Civil Engineering Research Department, Korea Railroad Research Institute, Republic of Korea)

Abstract ▼ AI-Helper

AbstractThis paper investigates an applicability of long-gauge fiber optic sensors to prestressed concrete structures. A main motivation is to monitor the deflection of railway bridges without intervenes of the signal intensity fluctuations. A 25m long and 1.8m deep bulb-tee prestressed concrete girder was compositely fabricated with a 2m wide and 22cm thick reinforced concrete deck. Two pairs of 3m long-gauge sensors were attached to the prestressed concrete girder with parallel topology. Using the geometric relationship between curvature and vertical deflection in a simple beam and the quadratic regression of curvatures at the discrete point, it is possible to extrapolate the deflection curve of the girder. The estimated deflection measured by the developed method is compared with the results using conventional strain gauges and LVDTs. It has been demonstrated that long-gauge fiber optic sensors could provide the same accuracy with conventional sensors.

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참고문헌 (16)

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Deflection estimation of a full scale prestressed concrete girder using long-gauge fiber optic sensors

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Deflection estimation of a full scale prestressed concrete girder using long-gauge fiber optic sensors

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