Structural monitoring of composite marine piles using fiber optic sensors

This paper discusses structural health monitoring data obtained using an optical fiber Bragg grating (FBG) sensor system consisting of sensors embedded in the filament-wound composite marine pile. A composite marine pile is a tube containing a cement core that is used to support bridges, piers, and other structures. This system has applications for structural health monitoring of these structures. This paper presents the results of tests that retrofit two existing composite piles with 30 Bragg grating sensors. Each pile was retrofitted with three arrays, two arrays consisting of 6 gratings and one consisting of 3 gratings for strain and temperature measurements, respectively. Grooves were cut in the piles to allow for adhesive installation of the sensor arrays, and fiberglass cloth tape was laminated over the arrays to protect the optical fiber during the pile driving process. Data were collected prior to and during the pile driving process using a commercial off-the-shelf FBG interrogation system. The purposes of these tests were to (1) determine the survivability of the sensor arrays during the pile driving process, (2) measure residual strains on the filament wound composite tube following the pile driving process, and (3) determine whether structural integrity issues are observed from the strain data.

[1]  G. Tadros,et al.  First Smart Highway Bridge in Canada , 1994 .

[2]  Gongkang Fu,et al.  ON THE USE OF MEASURED VIBRATION FOR DETECTING BRIDGE DAMAGE , 1995 .

[3]  David G. Bellemore,et al.  Distributed fiber Bragg grating strain sensing in reinforced concrete structural components , 1997 .

[4]  Jeffery Raphael Roesler,et al.  Using fiber-optic sensing techniques to monitor behavior of transportation materials , 1995 .

[5]  Barry G. Grossman,et al.  Three-Dimensional Structural Strain Measurement with the Use of Fiber-Optic Sensors , 1997 .

[6]  P. Choquet,et al.  New Fabry-Perot Fiber-Optic Sensors for Structural and Geotechnical Monitoring Applications , 1997 .

[7]  A. Kersey,et al.  Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry - Perot wavelength filter. , 1993, Optics letters.

[8]  이상배,et al.  Analysis of pile load transfer using optical fiber sensor , 2000 .

[9]  K-A Lou.  DEVELOPMENT OF A NOVEL FIBER-OPTIC STRAIN SENSOR SYSTEM FOR LONG-TERM MONITORING OF HIGHWAY STRUCTURES , 1997 .

[10]  F. Bilodeau,et al.  Photosensitivity in Optical Fibers , 1993 .

[11]  G. Meltz,et al.  Formation of Bragg gratings in optical fibers by a transverse holographic method. , 1989, Optics letters.

[12]  Sang Bae Lee,et al.  Analysis of pile load transfer using optical fiber sensor , 2000, Smart Structures.

[13]  Edward G. Nawy,et al.  Fiber Optic Sensing of Prestressed-Prism-Reinforced Continuous-Composite Concrete Beams for Bridge Deck Application , 1997 .